fix(docs): simplify docs versioning workflow

.github/workflows/docs-version-on-tag.yml

@@ -1,4 +1,4 @@
-name: Docs Version on Tag
+name: Version Docs on Tag
 
 on:
   push:
@@ -46,32 +46,24 @@ jobs:
             pnpm --dir docs-site docusaurus docs:version "${VERSION}"
           fi
 
-      - name: Set default docs version
-        env:
-          VERSION: ${{ github.ref_name }}
-        run: |
-          set -euo pipefail
-          node -e "const fs=require('fs'); const file='docs-site/docusaurus.config.ts'; const source=fs.readFileSync(file,'utf8'); const updated=source.replace(/lastVersion:\s*'[^']*',/, \"lastVersion: '\" + process.env.VERSION + \"',\"); if (source===updated) { throw new Error('Unable to update lastVersion in docusaurus.config.ts'); } fs.writeFileSync(file, updated);"
-
       - name: Build docs
         run: pnpm --dir docs-site build
 
       - name: Create docs version PR
         uses: peter-evans/create-pull-request@v6
         with:
-          commit-message: docs: snapshot ${{ github.ref_name }}
-          title: docs: snapshot ${{ github.ref_name }}
+          commit-message: "docs: snapshot ${{ github.ref_name }}"
+          title: "docs: snapshot ${{ github.ref_name }}"
           body: |
             Automated docs version snapshot for `${{ github.ref_name }}`.
 
             - Ran `docusaurus docs:version`
-            - Updated `lastVersion` in `docs-site/docusaurus.config.ts`
+            - Added versioned docs/sidebar snapshot files
           branch: docs/version-${{ github.ref_name }}
           base: main
           delete-branch: true
           labels: docs,automation
           add-paths: |
-            docs-site/docusaurus.config.ts
             docs-site/versions.json
             docs-site/versioned_docs/**
             docs-site/versioned_sidebars/**