fix: Update Ruby version for failing gems

Author: gaurav-nelson

.github/workflows/gh-pages.yml

@@ -16,7 +16,7 @@ jobs:
 
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: '3.3'
 
       - run: gem install asciidoctor rouge
 

.github/workflows/htmltest.yml

@@ -14,7 +14,7 @@ jobs:
 
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '2.7'
+          ruby-version: '3.3'
 
       - name: Install build dependencies
         run: |