fix(s3-aggreg): disambiguate action schema namespace

Otherwise schemas for `s3` and `s3_aggregated_upload` collide when
projected into OpenAPI schema.

apps/emqx_bridge_s3/src/emqx_bridge_s3_aggreg_upload.erl

@@ -35,7 +35,7 @@
 %%-------------------------------------------------------------------------------------------------
 
 namespace() ->
-    "bridge_s3".
+    "bridge_s3_aggreg_upload".
 
 roots() ->
     [].