More whack-a-mole with graalvm version

Author: barchetta

.github/workflows/validate.yml

@@ -31,7 +31,7 @@ on:
 env:
   JAVA_VERSION: 17.0.12
   JAVA_DISTRO: oracle
-  GRAALVM_VERSION: 21.3.3.1
+  GRAALVM_VERSION: 21.0.7
   MVN_ARGS: |
     -B -fae -e
     -Dmaven.wagon.httpconnectionManager.ttlSeconds=60