Try using ruby 2.7 for jekyll docs generation (#1720)

.github/workflows/publish-documentation-preview.yml

@@ -24,7 +24,7 @@ jobs:
         if: ${{ github.event.action == 'labeled' }}
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.1
+          ruby-version: 2.7
       - name: Install and Build 🔧
         # don't allow a close to execute anything from the source code
         if: ${{ github.event.action == 'labeled' }}

.github/workflows/publish-documentation-release.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.1
+          ruby-version: 2.7
       - name: Install and Build 🔧
         run: |
           VERSION=${{ github.ref_name }}

.github/workflows/publish-documentation.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.1
+          ruby-version: 2.7
       - name: Install and Build 🔧
         run: |
           # TODO find a way for jekyll to perform this automatically