Add blacklight 8 to test matrix

Author: jcoyne

.github/workflows/ruby.yml

@@ -2,7 +2,7 @@ name: CI
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
 
 jobs:
@@ -11,16 +11,20 @@ jobs:
     name: test (ruby ${{ matrix.ruby }} / rails ${{ matrix.rails_version }} / blacklight ${{ matrix.blacklight_version }} ${{ matrix.additional_name }})
     strategy:
       matrix:
-        rails_version: ['7.0.8.4']
-        ruby: ['3.1', '3.2']
-        bootstrap_version: ['~> 4.0']
-        blacklight_version: ['~> 7.34']
-        additional_engine_cart_rails_options: ['']
-        additional_name: ['']
+        rails_version: ["7.0.8.4"]
+        ruby: ["3.1", "3.2"]
+        bootstrap_version: ["~> 4.0"]
+        blacklight_version: ["~> 7.34"]
+        additional_engine_cart_rails_options: [""]
+        additional_name: [""]
         include:
-          - rails_version: '6.1.7.8'
-            ruby: '3.0'
-            blacklight_version: '7.34'
+          - rails_version: "6.1.7.8"
+            ruby: "3.0"
+            blacklight_version: "7.34"
+            bootstrap_version: ~> 4.0
+          - rails_version: "7.0.8.4"
+            ruby: "3.3"
+            blacklight_version: "8.0"
             bootstrap_version: ~> 4.0
     env:
       RAILS_VERSION: ${{ matrix.rails_version }}