Bump latest/stable image variant to java25 (#3845)

.github/workflows/build.yml

@@ -108,7 +108,7 @@ jobs:
     env:
       IMAGE_TO_TEST: "${{ github.repository_owner }}/minecraft-server:test-${{ matrix.variant }}-${{ github.run_id }}"
       HAS_IMAGE_REPO_ACCESS: ${{ secrets.DOCKER_USER != '' && secrets.DOCKER_PASSWORD != '' }}
-      MAIN_VARIANT: java21
+      MAIN_VARIANT: java25
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout

.github/workflows/verify-pr.yml

@@ -19,14 +19,14 @@ jobs:
       fail-fast: false
       matrix:
         variant:
-          - java21
+          - java25
           - java21-alpine
           - java17
           - java8
         include:
-        # JAVA 21:
-          - variant: java21
-            baseImage: eclipse-temurin:21-jre
+        # JAVA 21/25:
+          - variant: java25
+            baseImage: eclipse-temurin:25-jre
             platforms: linux/amd64,linux/arm64
             mcVersion: latest
           - variant: java21-alpine