fix: bump AM and AE to their respective next version

Author: remisultan

_config.yml

@@ -124,11 +124,11 @@ products:
     ee:
       version: 3.20.0
   am:
-    version: 3.20.0
+    version: 3.21.0
     ee:
-      version: 3.20.0
+      version: 3.21.0
   ae:
-    version: 2.0.0
+    version: 2.1.0
     name: Gravitee.io Alert Engine (AE)
 
 asciidoc: {}