fix: Update branch reference in the workflow, now that PR branch has been merged into main (#1390)

Follow-up to #1082, specifically
github-community-projects/continuous-ai-for-accessibility-scanner#1082 (comment)

Author: smockle

.github/workflows/test.yml

@@ -64,7 +64,7 @@ jobs:
           echo "cache_key=$(printf 'cached_findings-%s-%s.json' "${{ github.ref_name }}" "${{ matrix.site }}" | tr -cs 'A-Za-z0-9._-' '_')" >> $GITHUB_OUTPUT
 
       - name: Scan site (${{ matrix.site }})
-        uses: github-community-projects/continuous-ai-for-accessibility-scanner@smockle/auth-plus-basic
+        uses: github-community-projects/continuous-ai-for-accessibility-scanner@main
         with:
           urls: |
             http://127.0.0.1:4000/