Update snapcraft.yaml

Move to openjdk 11

Author: EndrII

snap/snapcraft.yaml

@@ -18,13 +18,13 @@ parts:
     stage-packages:
       - libfreetype6
       - libpng16-16
-      - openjdk-8-jdk
-      - openjdk-8-jre
-      - openjdk-8-jre-headless
+      - openjdk-11-jdk
+      - openjdk-11-jre
+      - openjdk-11-jre-headless
     build-packages:
       - ca-certificates
       - ca-certificates-java
-      - openjdk-8-jre-headless
+      - openjdk-11-jre-headless
     override-stage: |
       snapcraftctl stage
       chmod 777 -R "$SNAPCRAFT_STAGE/cmdline-tools"