chore: update ruby version to 3.4

Author: sidey79

.github/workflows/docs.yml

@@ -18,7 +18,7 @@ jobs:
 
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: 3.4
 
       - uses: reitzig/[email protected]
         with: