Add JDK-20 to CI build matrix

Signed-off-by: Andriy Redko <andriy.redko@aiven.io>

Author: reta

.github/workflows/CI-workflow.yml

@@ -11,7 +11,7 @@ jobs:
   Build-ml:
     strategy:
       matrix:
-        java: [11, 17]
+        java: [11, 17, 20]
 
     name: Build and Test MLCommons Plugin
     runs-on: ubuntu-latest
@@ -89,7 +89,7 @@ jobs:
   Build-ml-windows:
     strategy:
       matrix:
-        java: [11, 17]
+        java: [11, 17, 20]
     name: Build and Test MLCommons Plugin on Windows
     runs-on: windows-latest