Remove jruby 9.3 from testing

Author: Dominik Goltermann

.github/workflows/actions.yml

@@ -3,9 +3,9 @@ name: actions
 
 on:
   push:
-    branches: [ main, master ]
+    branches: [main, master]
   pull_request:
-    branches: [ main, master ]
+    branches: [main, master]
 
 permissions:
   contents: read
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ["2.7", "3.0", "3.1", "3.2", "3.3", "jruby-9.3", "jruby-9.4"]
+        ruby-version: ["2.7", "3.0", "3.1", "3.2", "3.3", "jruby-9.4"]
     steps:
       - uses: actions/checkout@v3
       - uses: ruby/setup-ruby@v1
@@ -25,4 +25,4 @@ jobs:
           bundler-cache: false
       - run: bundle install
       - run: bundle exec rspec
-      - run: bundle exec rubocop
+      - run: bundle exec rubocop