Remove JDK11 from GHAs

Author: ruivieira

.github/workflows/workflow.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         python-version: [ 3.8, 3.9 ]
-        java-version: [ 11, 17 ]
+        java-version: [ 17 ]
         maven-version: [ '3.8.6' ]
     steps:
       - uses: actions/checkout@v2