fix: explicitly set charset to utf-8

[timkim]

This sets our pages to explictly be utf-8. Normally our pages already set to uft-8 by default but in AdobeDocsPrivate, it seems to set it to a legacy charset: 'windows-1252' which is causing some rendering issues.

This is a little hard to test since our pages are all on utf-8 but if you look at:
https://charset--adp-devsite-stage--adobedocs.aem.page/app-builder/docs/intro_and_overview/

And inspect the head, you should see a value:

After we merge this into prod, we can test the other pages (https://developer-stage.adobe.com/autocrop-api/api/#operation/facadeJobStatus or https://developer-stage.adobe.com/harmonize-image/api/#operation/harmonizeAsync) and see if it fixes the rendering issues

[aem-code-sync]

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Commits

• 19eee46 ✅ (latest)

[aem-code-sync]

	Page	Scores	Audits	Google
📱	/app-builder/docs/intro_and_overview/
🖥️	/app-builder/docs/intro_and_overview/

[github-actions]

❌ Test Results

Status: Some tests failed!

🔍 Click to view failed tests

📁 test/blocks/code/code.test.js:

❌ Code block > code > data-playground attributes from class
      AssertionError: expected null to equal 'code-session'
        at n.<anonymous> (test/blocks/code/code.test.js:29:63)


📁 test/blocks/columns/columns.test.js:

❌ Columns block > Columns > columns-container
      AssertionError: expected false to be true
      + expected - actual
      
      -false
      +true
      
      at n.<anonymous> (test/blocks/columns/columns.test.js:29:117)

❌ Columns block > Columns > buttons
      AssertionError: expected false to be true
      + expected - actual
      
      -false
      +true
      
      at test/blocks/columns/columns.test.js:100:86
      at NodeList.forEach (<anonymous>)
      at n.<anonymous> (test/blocks/columns/columns.test.js:95:50)


📁 test/blocks/embed/embed.test.js:

❌ Could not import your test module. Check the browser logs or open the browser in debug mode for more information.


📁 test/blocks/contributors/contributors.test.js:

❌ Contributors block > contributors > firstDiv
      AssertionError: expected null to exist
        at n.<anonymous> (test/blocks/contributors/contributors.test.js:32:28)

❌ Contributors block > contributors > remove divs without children
      AssertionError: expected false to be true
      + expected - actual
      
      -false
      +true
      
      at test/blocks/contributors/contributors.test.js:42:44
      at NodeList.forEach (<anonymous>)
      at n.<anonymous> (test/blocks/contributors/contributors.test.js:41:51)

❌ Contributors block > contributors > last update div
      AssertionError: expected '' to equal 'https://github.com/AdobeDocs/express-add-ons-docs/commits/main/src/pages/references/index.md'
      + expected - actual
      
      +https://github.com/AdobeDocs/express-add-ons-docs/commits/main/src/pages/references/index.md
      
      at n.<anonymous> (test/blocks/contributors/contributors.test.js:53:40)

❌ Contributors block > contributors > image list div
      AssertionError: expected null to exist
        at test/blocks/contributors/contributors.test.js:71:27
        at Array.forEach (<anonymous>)
        at n.<anonymous> (test/blocks/contributors/contributors.test.js:69:33)


📁 test/blocks/tab/tab-playground.test.js:

❌ Tab block playground metadata > extracts data-playground attributes via decoratePreformattedCode
      AssertionError: expected null to equal 'tab-session'
        at n.<anonymous> (test/blocks/tab/tab-playground.test.js:17:63)


📁 test/blocks/tab/tab.test.js:

❌ Tab block > Tab Button Structure > tab > button load structure
      AssertionError: expected 'tab-button active' to equal 'tab-button'
      + expected - actual
      
      -tab-button active
      +tab-button
      
      at n.<anonymous> (test/blocks/tab/tab.test.js:60:38)

❌ Tab block > Sub-tabs > sub-tab > attributes
      AssertionError: expected 'subTab1' to equal 'subTab3'
      + expected - actual
      
      -subTab1
      +subTab3
      
      at test/blocks/tab/tab.test.js:135:58
      at NodeList.forEach (<anonymous>)
      at n.<anonymous> (test/blocks/tab/tab.test.js:133:23)

Test Coverage Report

Overall Coverage Summary

Metric	Percentage	Coverage
Statements	58.32%	3511/6020
Branches	84.6%	478/565
Functions	53.48%	115/215
Lines	58.32%	3511/6020

Coverage by File/Directory

File	Statements	Branches	Functions	Lines
blocks/accordion	100%	100%	100%	100%
blocks/announcement	76.69%	60%	100%	76.69%
blocks/banner	94.28%	62.5%	100%	94.28%
blocks/cards	94.04%	94.73%	100%	94.04%
blocks/carousel	76.9%	77.77%	75%	76.9%
blocks/code	81.81%	60%	100%	81.81%
blocks/columns	67.78%	76.92%	100%	67.78%
blocks/contributors	84.23%	56%	100%	84.23%
blocks/edition	91.37%	57.14%	100%	91.37%
blocks/fragment	17.03%	100%	0%	17.03%
blocks/image-text	57.5%	55.55%	100%	57.5%
blocks/info	96.87%	100%	100%	96.87%
blocks/info-card	100%	100%	100%	100%
blocks/info-columns	75%	100%	100%	75%
blocks/list	59.09%	85.71%	100%	59.09%
blocks/mini-resource-card	97.89%	87.5%	100%	97.89%
blocks/product-card	78.57%	94.11%	100%	78.57%
blocks/profile-card	96.29%	100%	100%	96.29%
blocks/site-hero	93.93%	80%	100%	93.93%
blocks/summary	98.36%	88.88%	100%	98.36%
blocks/tab	93.25%	96.87%	100%	93.25%
blocks/table	100%	84.61%	100%	100%
blocks/text	49.01%	83.33%	50%	49.01%
blocks/title	84%	66.66%	100%	84%
components	57.83%	78.68%	58.33%	57.83%
scripts	47.15%	92.82%	41.83%	47.15%

---

Coverage report generated at 2026-06-16T20:34:31.717Z