Codespaces write-all permission syntax is incorrect (#17630)

* Codespaces `write-all` permission syntax is incorrect

Codespaces `write-all` permission syntax is incorrect

The current docs show invalid json

* Update managing-repository-access-for-your-codespaces.md

* Update managing-repository-access-for-your-codespaces.md

Co-authored-by: hubwriter <hubwriter@github.com>

Author: Mark Phelps

content/codespaces/managing-your-codespaces/managing-repository-access-for-your-codespaces.md

@@ -87,17 +87,15 @@ To create codespaces with custom permissions defined, you must use one of the fo
   }
   ```
 
-  To set all permissions for a given repository, use `read-all` or `write-all` in the `permissions` object
+  To set all permissions for a given repository, use `"permissions": "read-all"` or `"permissions": "write-all"` in the repository object.
 
   ```json
   {
     "customizations": {
       "codespaces": {
         "repositories": {
           "my_org/my_repo": {
-            "permissions": {
-              "write-all"
-            }
+            "permissions": "write-all"
           }
         }
       }