Update github actions

Author: alexandermeindl

.github/workflows/rubocop.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Install package dependencies
       run: >
@@ -17,7 +17,7 @@ jobs:
     - name: Setup Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 3.2
+        ruby-version: 3.3
         bundler-cache: true
 
     - name: Setup gems

.github/workflows/tests.yml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout redmine_plugin_kit
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: redmine_plugin_kit