Build rails 8 on ruby 3.3

Author: bogdan

.github/workflows/ci.yml

@@ -11,13 +11,17 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: ["2.7"]
-        gemfile:
-          - gemfiles/rails50_sprockets_3.gemfile
-          - gemfiles/rails51_sprockets_3.gemfile
-          - gemfiles/rails52_sprockets_3.gemfile
-          - gemfiles/rails70_sprockets_4.gemfile
-          - gemfiles/rails80_sprockets_4.gemfile
+        include:
+          - ruby: "2.7"
+            gemfile: gemfiles/rails50_sprockets_3.gemfile
+          - ruby: "2.7"
+            gemfile: gemfiles/rails51_sprockets_3.gemfile
+          - ruby: "2.7"
+            gemfile: gemfiles/rails52_sprockets_3.gemfile
+          - ruby: "2.7"
+            gemfile: gemfiles/rails70_sprockets_4.gemfile
+          - ruby: "3.3"
+            gemfile: gemfiles/rails80_sprockets_4.gemfile
 
     env:
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}