Merge branch '10832-package-repository-group-endpoint-url-encoding' into 'master'

Resolve "Package repository group endpoint URL encoding"

Closes #10832

See merge request gitlab-org/gitlab-ee!10567

doc/user/project/packages/maven_repository.md

@@ -197,9 +197,8 @@ domain name.
 
 NOTE: **Note:**
 For retrieving artifacts, you can use either the
-[URL encoded](../../../api/README.md#namespaced-path-encoding) path of the project
-(e.g., `group%2Fproject`) or the project's ID (e.g., `42`). However, only the
-project's ID can be used for uploading.
+[URL encoded](../../../api/README.md#namespaced-path-encoding) path of the group
+(e.g., `group%2Fsubgroup`) or the group's ID (e.g., `12`). 
 
 ### Instance level Maven endpoint