Cleanup old Perforce CI configuration

Author: bastelfreak

.github/workflows/docker.yml

@@ -1,3 +1,4 @@
+---
 name: Docker test and publish
 
 on:
@@ -7,14 +8,15 @@ on:
 
 jobs:
   build-and-publish:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
 
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v4
       - name: Set up Ruby 2.6
         uses: actions/setup-ruby@v1
         with:
-          ruby-version: 2.6.x
+          ruby-version: '3.4'
+          bundler-cache: true
       - run: gem install bundler
       - name: Build container
         env:

.github/workflows/mend.yaml

@@ -1,3 +1,4 @@
+---
 name: mend_scan
 on:
   workflow_dispatch:
@@ -6,14 +7,14 @@ on:
       - main
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
     - name: connect_twingate
       uses: twingate/github-action@v1
       with:
         service-key: ${{ secrets.TWINGATE_PUBLIC_REPO_KEY }}
     - name: checkout repo content
-      uses: actions/checkout@v2 # checkout the repository content to github runner.
+      uses: actions/checkout@v4 # checkout the repository content to github runner.
       with:
         fetch-depth: 1
     # install java which is required for mend and clojure

.github/workflows/pr.yml

@@ -1,10 +1,16 @@
+---
 name: PR testing
 
-on: [push, pull_request]
+# run on each PR and on merges to main
+on:
+  pull_request: {}
+  push:
+    branches:
+      - main
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         java: [ '11, '17' ]
@@ -13,7 +19,7 @@ jobs:
 
     name: Java ${{ matrix.java }} tests
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v4
       - name: setup java
         uses: actions/setup-java@v3
         with: