fix java version in pom.xml, remove upload artifacts in action

.gitea/workflows/maven.yml

@@ -22,13 +22,11 @@ jobs:
           cache: 'maven'
       - name: Build, Test and Package with Maven
         run: mvn -B verify --file pom.xml -e
-#      - name: Run tests
-#        run: mvn test
-      - name: Upload artifact
-        uses: actions/upload-artifact@v3
-        with:
-          name: build-artifact
-          path: target/*.jar
+#      - name: Upload artifact
+#        uses: actions/upload-artifact@v3
+#        with:
+#          name: build-artifact
+#          path: target/*.jar
       - name: Create Maven settings.xml
         run: |
           cat <<EOF > ~/.m2/settings.xml

pom.xml

@@ -27,7 +27,7 @@
         <url/>
     </scm>
     <properties>
-        <java.version>17</java.version>
+        <java.version>21</java.version>
     </properties>
     <dependencies>
         <dependency>