Disambiguate tag in GraphQL docs

- Tag can be for a project or a Git repository

app/graphql/types/project_type.rb

@@ -26,7 +26,7 @@ module Types
     markdown_field :description_html, null: true
 
     field :tag_list, GraphQL::STRING_TYPE, null: true,
-          description: 'List of project tags'
+          description: 'List of project topics (not Git tags)'
 
     field :ssh_url_to_repo, GraphQL::STRING_TYPE, null: true,
           description: 'URL to connect to the project via SSH'

doc/api/graphql/reference/gitlab_schema.graphql

@@ -6837,7 +6837,7 @@ type Project {
   suggestionCommitMessage: String
 
   """
-  List of project tags
+  List of project topics (not Git tags)
   """
   tagList: String
 

doc/api/graphql/reference/gitlab_schema.json

@@ -20372,7 +20372,7 @@
             },
             {
               "name": "tagList",
-              "description": "List of project tags",
+              "description": "List of project topics (not Git tags)",
               "args": [
 
               ],

doc/api/graphql/reference/index.md

@@ -995,7 +995,7 @@ Information about pagination in a connection.
 | `starCount` | Int! | Number of times the project has been starred |
 | `statistics` | ProjectStatistics | Statistics of the project |
 | `suggestionCommitMessage` | String | The commit message used to apply merge request suggestions |
-| `tagList` | String | List of project tags |
+| `tagList` | String | List of project topics (not Git tags) |
 | `userPermissions` | ProjectPermissions! | Permissions for the current user on the resource |
 | `visibility` | String | Visibility of the project |
 | `vulnerabilitySeveritiesCount` | VulnerabilitySeveritiesCount | Counts for each severity of vulnerability of the project. Available only when feature flag `first_class_vulnerabilities` is enabled |