Added maven installation to build

.gitea/workflows/build.yaml

@@ -20,6 +20,15 @@ jobs:
           distribution: oracle
           java-version: "25"
           cache: maven
+       - name: Install Maven
+         run: |
+          apt-get update
+          apt-get install -y maven
+        
+- name: Check versions
+  run: |
+    java --version
+    mvn --version
 
       - name: Build with Maven
         run: mvn --batch-mode clean package