Bump Publish to website actions to current majors (#641)

actions/checkout@v2 and actions/setup-node@v1 target the Node 20 runtime,
which GitHub now force-runs on Node 24 and is deprecating. Move both to the
current major (checkout@v7, setup-node@v7) to clear the deprecation warning
and avoid a future hard break. node-version stays 18 so the build
environment is unchanged.


Claude-Session: https://claude.ai/code/session_01H1niVBoyczk8mXe9L7Fnzv

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: rrrutledge

.github/workflows/publish-to-website.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Learning Path
-        uses: actions/checkout@v2
+        uses: actions/checkout@v7
         with:
           path: ./InnerSourceLearningPath
           ssh-key: ${{ secrets.LEARNING_PATH_DEPLOY_KEY }}
@@ -39,7 +39,7 @@ jobs:
             git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
             git diff --quiet || (git commit -am "Update Links in Translations" && git push)
       - name: Checkout innersourcecommons.org
-        uses: actions/checkout@v2
+        uses: actions/checkout@v7
         with:
           ssh-key: ${{ secrets.WEBSITE_DEPLOY_KEY }}
           path: ./innersourcecommons.org
@@ -49,7 +49,7 @@ jobs:
         working-directory: innersourcecommons.org
         run: |
             git checkout
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v7
         with:
           node-version: 18
       - name: Build