Update HTML accessibility check workflow version

Author: mgough-970

.github/workflows/weekly_html_accessibility_check.yml

@@ -17,7 +17,7 @@ on:
 
 jobs:
   Scheduled:
-   uses: spacetelescope/notebook-ci-actions/.github/workflows/html_accessibility_check.yml@v3
+   uses: spacetelescope/notebook-ci-actions/.github/workflows/html_accessibility_check.yml@v1
    with:
      target_url: https://spacetelescope.github.io/${{ github.event.repository.name }}/
      python-version: ${{ vars.PYTHON_VERSION }}