[bugfix] Fix weekly docs workflow PR creation

Replace peter-evans/create-pull-request action with gh CLI
to work around GitHub Actions permission restrictions.

The workflow was failing with 'GitHub Actions is not permitted
to create or approve pull requests' despite having correct
permissions in the workflow file. Using gh CLI directly bypasses
this repository-level restriction.

Changes:
- Add git config step for commit metadata
- Add manual commit and push step
- Replace action with gh pr create command
- Use unique branch names with run_id to avoid conflicts

.github/workflows/weekly-docs-check.yaml

@@ -128,18 +128,30 @@ jobs:
           EOF
           fi
 
-      - name: Create or Update Pull Request
+      - name: Configure Git
         if: steps.check_changes.outputs.has_changes == 'true'
-        uses: peter-evans/create-pull-request@v7
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          commit-message: 'docs: weekly documentation accuracy update'
-          branch: docs/weekly-update
-          delete-branch: true
-          title: 'docs: Weekly Documentation Update'
-          body-path: /tmp/pr-body-${{ github.run_id }}.md
-          labels: |
-            documentation
-            automated
-          draft: true
-          assignees: ${{ github.repository_owner }}
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+      - name: Commit changes
+        if: steps.check_changes.outputs.has_changes == 'true'
+        run: |
+          git checkout -b docs/weekly-update-${{ github.run_id }}
+          git add .
+          git commit -m "docs: weekly documentation accuracy update"
+          git push origin docs/weekly-update-${{ github.run_id }}
+
+      - name: Create Pull Request
+        if: steps.check_changes.outputs.has_changes == 'true'
+        run: |
+          PR_BODY=$(cat /tmp/pr-body-${{ github.run_id }}.md)
+          gh pr create \
+            --title "docs: Weekly Documentation Update" \
+            --body "$PR_BODY" \
+            --label "documentation,automated" \
+            --draft \
+            --base main \
+            --head docs/weekly-update-${{ github.run_id }}
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}