Update codecov version

Author: ThomasJejkal

.github/workflows/gradle.yml

@@ -59,6 +59,6 @@ jobs:
     - name: Build with Gradle (JDK ${{ env.currentBuildVersion }})
       run: ./gradlew clean check jacocoTestReport
     - name: Codecov
-      uses: codecov/codecov-action@v1
+      uses: codecov/codecov-action@v3
       with:
         files: ./build/reports/jacoco/test/jacocoTestReport.xml #optional