Update maven.yml

upgrade to JDK 19 since JDK 15 isn't anymore available

Author: innovimax

.github/workflows/maven.yml

@@ -16,10 +16,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
-    - name: Set up JDK 15
+    - name: Set up JDK 19
       uses: actions/setup-java@v3
       with:
-        java-version: '15'
+        java-version: '19'
         distribution: 'temurin'
         cache: maven
     - name: Build with Maven