chore: upgrade actions to v6 (Node 24 native)

- actions/checkout@v4 → v6
- actions/setup-node@v4 → v6
- pandoc/actions/setup@v1 → v1.1.1
- Remove FORCE_JAVASCRIPT_ACTIONS_TO_NODE24 (no longer needed)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: JohnRDOrazio

.github/workflows/deploy-docs.yml

@@ -13,12 +13,10 @@ jobs:
   deploy:
     name: Convert & publish governance docs
     runs-on: ubuntu-latest
-    env:
-      FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -76,7 +74,7 @@ jobs:
           echo "changed_docs=$CHANGED_DOCS" >> "$GITHUB_OUTPUT"
 
       - name: Install pandoc
-        uses: pandoc/actions/setup@v1
+        uses: pandoc/actions/setup@v1.1.1
 
       - name: Deploy changed documents to WordPress
         if: steps.changes.outputs.changed_docs != ''
@@ -231,7 +229,7 @@ jobs:
           echo "All translations complete."
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: '24'
           cache: 'npm'

.github/workflows/markdown-lint.yml

@@ -16,15 +16,13 @@ jobs:
   lint:
     name: Lint Markdown
     runs-on: ubuntu-latest
-    env:
-      FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: '24'