fix string

Signed-off-by: Olivier Lamy <olamy@apache.org>

Author: olamy

.github/workflows/maven.yml

@@ -47,7 +47,7 @@ on:
       jdk-distribution-matrix:
         description: "jdk distribution matrix"
         required: false
-        default: '[ "temurin", "adopt ]'
+        default: '[ "temurin", "adopt" ]'
         type: string
 
 jobs: