chore(main): release 1.6.0 (#21)

* chore(main): release 1.6.0

* Revise CHANGELOG for Knowledge Graph v1.6.0

Updated the changelog for version 1.6.0 with new features and data quality improvements.

* nit update

* nit update

---------

Co-authored-by: czi-github-helper[bot] <95879977+czi-github-helper[bot]@users.noreply.github.com>
Co-authored-by: Warenga Maina <wmaina@chanzuckerberg.com>

Author: czi-github-helper[bot]

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "1.5.0"
+  ".": "1.6.0"
 }

CHANGELOG.md

@@ -1,5 +1,20 @@
 # Changelog
 
+## Knowledge Graph [v1.6.0](https://github.com/learning-commons-org/knowledge-graph/compare/v1.5.0...v1.6.0) (2026-03-12)
+
+**March 12, 2026**
+
+### Learning component aligned states
+
+We’ve added alignments to learning components and crosswalks to Common Core for standards from:
+
+* Kansas
+
+### Data quality improvements
+
+* We've updated some of the alignments between learning components and Massachusetts state standards in order to fix some inconsistent alignments.
+* We've fixed the direction of the hasDependency relationship between curriculum components in Illustrative Mathematics content.
+
 ## Knowledge Graph [v1.5.0](https://github.com/learning-commons-org/knowledge-graph/compare/v1.4.0...v1.5.0) (2026-02-26)
 
 **February 26, 2026**