Merge branch 'master' into 'master'

Issue #21440: Small fix to curl example for adding member to project

## What does this MR do?
Two lines changed in docs to move the user_id field out of the url and onto the query string 

## Why was this MR needed?
Issue #21440 reported under Issues. The documentation example for adding members to a project had a slight problem. 

## What are the relevant issue numbers?
Closes #21440.

See merge request !6236

doc/api/members.md

@@ -110,8 +110,8 @@ POST /projects/:id/members
 | `expires_at` | string | no | A date string in the format YEAR-MONTH-DAY |
 
 ```bash
-curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/groups/:id/members/:user_id?access_level=30
-curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/:id/members/:user_id?access_level=30
+curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" --data "user_id=1&access_level=30" https://gitlab.example.com/api/v3/groups/:id/members
+curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" --data "user_id=1&access_level=30" https://gitlab.example.com/api/v3/projects/:id/members
 ```
 
 Example response: