docs: explain how to access room state for gitlab projects (#1016)

* docs: explain how to access room state for gitlab projects

Closes #260 

Signed-off-by: Gwenn Le Bihan <[email protected]>

* Update gitlab_project.md

Signed-off-by: Gwenn Le Bihan <[email protected]>

* Update docs/usage/room_configuration/gitlab_project.md

Signed-off-by: Will Hunt <[email protected]>

* Create 1016.doc

Signed-off-by: Will Hunt <[email protected]>

---------

Signed-off-by: Gwenn Le Bihan <[email protected]>
Signed-off-by: Will Hunt <[email protected]>
Co-authored-by: Will Hunt <[email protected]>
Co-authored-by: Will Hunt <[email protected]>

Author: gwennlbh

changelog.d/1016.doc

@@ -0,0 +1 @@
+Explain how to edit room state for GitLab projects from within Element.

docs/usage/room_configuration/gitlab_project.md

@@ -19,7 +19,7 @@ To set up a connection to a GitLab project in a new room:
 
 ## Configuration
 
-This connection supports a few options which can be defined in the room state:
+This connection supports a few options which can be defined in the room state[^2]:
 
 | Option | Description | Allowed values | Default |
 |--------|-------------|----------------|---------|
@@ -34,6 +34,8 @@ This connection supports a few options which can be defined in the room state:
 
 [^1]: `ignoreHooks` is no longer accepted for new state events. Use `enableHooks` to explicitly state all events you want to see.
 
+[^2]: To change room state with Element Web/Desktop: open devtools by typing `/devtools` + enter in the chat box, and click on "Explore room state". Next, choose `uk.half-shot.matrix-hookshot.gitlab.repository`. You'll then be able to see and edit (if you have the required permissions) the settings by setting properties on the JSON object directly.
+
 
 ### Supported event types