fix(ci): building website would fail if gh-pages branch wasn't pulled (…

…#373)

Signed-off-by: Alessandro Pomponio <alessandro.pomponio1@ibm.com>

.github/workflows/ci.yml

@@ -15,6 +15,11 @@ jobs:
       contents: write
     runs-on: ubuntu-latest
     steps:
+      # Ensure we have the gh-pages branch locally
+      - uses: actions/checkout@v3
+        with:
+          ref: gh-pages
+      # This will check us out back to main
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with: