docs: add ci.yml to workflows table in README

ci: remove FORCE_JAVASCRIPT_ACTIONS_TO_NODE24

Remove the major version ignore rules that were added based on
stale knowledge.

Author: morbeo

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ on:
     branches: [master]
 
 env:
-  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+  environment: gh-pages
 
 jobs:
   ci:

.github/workflows/deploy.yml

@@ -15,7 +15,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+  environment: gh-pages
 
 jobs:
   deploy:

README.md

@@ -139,13 +139,14 @@ restore or share your question bank.
 
 ### Workflows
 
-| Workflow     | Trigger                   | Purpose                                                       |
-| ------------ | ------------------------- | ------------------------------------------------------------- |
-| `deploy.yml` | push to `master` + manual | Type-check → lint → **test** → build → deploy to GitHub Pages |
+| Workflow     | Trigger                   | Purpose                                                        |
+| ------------ | ------------------------- | -------------------------------------------------------------- |
+| `ci.yml`     | PRs to `master`           | Type-check, lint, test, build — blocks merge if any step fails |
+| `deploy.yml` | push to `master` + manual | Type-check → lint → **test** → build → deploy to GitHub Pages  |
 
-Sets `FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true` to opt into the Node 24 runner ahead of the June 2026 forced migration.
+Both workflows set `FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true` to opt into the Node 24 runner ahead of the June 2026 forced migration.
 
-A push to `master` only deploys if all four gates pass. A failing test or lint error blocks the deploy.
+A push to `master` only deploys if all four gates pass. Dependabot PRs run through `ci.yml` automatically before merge.
 
 ### Versioning