Fix YAML indentation error in benchmark workflow

- Fix incorrect indentation of Store benchmark result step
- YAML syntax is now correct

Author: testingapisname

.github/workflows/benchmark.yml

@@ -68,6 +68,26 @@ jobs:
           echo "=== GitHub Actions format ==="
           head -20 benchmark-results-gh.json
       
+      - name: Create gh-pages branch if needed
+        run: |
+          # Check if gh-pages branch exists
+          if ! git ls-remote --exit-code --heads origin gh-pages > /dev/null 2>&1; then
+            echo "Creating empty gh-pages branch..."
+            git config user.name 'github-action-benchmark'
+            git config user.email 'github@users.noreply.github.com'
+            git checkout --orphan gh-pages
+            git rm -rf .
+            echo "# HSM Performance Benchmarks" > README.md
+            echo "" >> README.md
+            echo "Automated benchmark results generated by GitHub Actions." >> README.md
+            git add README.md
+            git commit -m "Initialize gh-pages branch for benchmarks"
+            git push origin gh-pages
+            git checkout main
+            echo "✓ Created gh-pages branch"
+          else
+            echo "✓ gh-pages branch already exists"
+          fi
       
       - name: Store benchmark result
         uses: benchmark-action/github-action-benchmark@v1
@@ -77,11 +97,15 @@ jobs:
           output-file-path: benchmark-results-gh.json
           github-token: ${{ secrets.GITHUB_TOKEN }}
           auto-push: true
+          gh-pages-branch: gh-pages
+          benchmark-data-dir-path: dev/bench
           # Show alert with commit comment on detecting possible performance regression
           alert-threshold: '150%'  # Alert if performance degrades by 50%
           comment-on-alert: true
           fail-on-alert: false
           alert-comment-cc-users: '@testingapisname'
+          # Skip fetch when gh-pages doesn't exist yet
+          skip-fetch-gh-pages: false
 
       - name: Upload benchmark results as artifacts
         uses: actions/upload-artifact@v4