chore: upgrade to newer github workflow actions, use jdk 21 to build

Author: ktor

.github/workflows/build.yml

@@ -10,21 +10,21 @@ jobs:
         name: Maven clean package
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v2
+            -   uses: actions/checkout@v4
                 with:
                     fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
             -   name: Set up JDK 11
-                uses: actions/setup-java@v1
+                uses: actions/setup-java@v4
                 with:
                     java-version: 11
             -   name: Cache SonarCloud packages
-                uses: actions/cache@v1
+                uses: actions/cache@v4
                 with:
                     path: ~/.sonar/cache
                     key: ${{ runner.os }}-sonar
                     restore-keys: ${{ runner.os }}-sonar
             -   name: Cache Maven packages
-                uses: actions/cache@v1
+                uses: actions/cache@v4
                 with:
                     path: ~/.m2
                     key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}

.github/workflows/sonarcloud.yml

@@ -17,21 +17,21 @@ jobs:
     if: contains(github.event.pull_request.labels.*.name, 'safe to run with secrets')
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
       - name: Set up JDK 11
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v4
         with:
             java-version: 11
       - name: Cache Maven packages
-        uses: actions/cache@v1
+        uses: actions/cache@v4
         with:
             path: ~/.m2
             key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
             restore-keys: ${{ runner.os }}-m2
       - name: Cache SonarCloud packages
-        uses: actions/cache@v1
+        uses: actions/cache@v4
         with:
             path: ~/.sonar/cache
             key: ${{ runner.os }}-sonar