chore(ci): inject PR head's commit hash

Author: lacolaco

.github/workflows/adev-preview-build.yml

@@ -50,7 +50,7 @@ jobs:
         run: echo "${{ github.event.pull_request.number }}" >> __metadata__pull_number.txt
         working-directory: build/dist/bin/adev/build/browser
       - name: Inject commit hash
-        run: echo "${{ github.sha }}" >> __metadata__commit_hash.txt
+        run: echo "${{ github.event.pull_request.head.sha }}" >> __metadata__commit_hash.txt
         working-directory: build/dist/bin/adev/build/browser
       - uses: actions/upload-artifact@v4
         with: