fix(ci): activate Java 25 for Minecraft update checks (#5090)

.github/workflows/action-update-check.yml

@@ -31,6 +31,13 @@ jobs:
       - name: Install dependencies
         run: sudo dpkg --add-architecture i386; sudo apt-get update;
 
+      - name: Install Java 25
+        if: matrix.shortname == 'mc' || matrix.shortname == 'pmc'
+        run: |
+          sudo apt-get install -y openjdk-25-jre
+          sudo update-alternatives --set java /usr/lib/jvm/java-25-openjdk-amd64/bin/java
+          java -version
+
       - name: Grab server
         run: LGSM_GITHUBBRANCH="${LGSM_REF}" ./linuxgsm.sh ${{ matrix.shortname }}server