Update qualitycheck.yml

Try the suggested sonarcloud.io workflow as is (expect renamed build->qualitycheck)

.github/workflows/qualitycheck.yml

@@ -1,31 +1,36 @@
-name: QualityCheck
+name: qualitycheck
 on:
-  workflow_dispatch:
   push:
     branches:
-      - main
+      - master
   pull_request:
     types: [opened, synchronize, reopened]
-
-env:
-  MAVEN_OPTS: -Dhttp.keepAlive=false -Dmaven.wagon.http.pool=false -Dmaven.wagon.http.retryHandler.count=3 -Dmaven.wagon.httpconnectionManager.ttlSeconds=120
-
 jobs:
   build:
-    name: QualityCheck
+    name: qualitycheck
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
         with:
-          fetch-depth: 0 # Shallow clones should be disabled for a better relevancy of analysis
-      - name: Set up JDK 8
-        uses: actions/setup-java@v2
+          fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
         with:
-          java-version: 8
-          distribution: "adopt"
-          cache: maven
+          java-version: 11
+      - name: Cache SonarCloud packages
+        uses: actions/cache@v1
+        with:
+          path: ~/.sonar/cache
+          key: ${{ runner.os }}-sonar
+          restore-keys: ${{ runner.os }}-sonar
+      - name: Cache Maven packages
+        uses: actions/cache@v1
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
       - name: Build and analyze
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # Needed to get PR information, if any
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
-        run: mvn -e -B verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=glotaran_glotaran-legacy
+        run: mvn -B verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=glotaran_glotaran-legacy