Update OpenAPI 3.0 Descriptions

Author: github-openapi-bot

descriptions/api.github.com/api.github.com.json

@@ -4576,6 +4576,9 @@ paths:
                           type: integer
                           example: 80
                         size:
+                          description: The size of the repository. Size is calculated
+                            hourly. When a repository is initially created, the size
+                            is 0.
                           type: integer
                           example: 108
                         default_branch:
@@ -14131,6 +14134,9 @@ paths:
                         watchers_count:
                           type: integer
                         size:
+                          description: The size of the repository. Size is calculated
+                            hourly. When a repository is initially created, the size
+                            is 0.
                           type: integer
                         default_branch:
                           type: string
@@ -24644,6 +24650,8 @@ paths:
                     type: integer
                     example: 80
                   size:
+                    description: The size of the repository. Size is calculated hourly.
+                      When a repository is initially created, the size is 0.
                     type: integer
                     example: 108
                   default_branch:
@@ -57431,7 +57439,7 @@ paths:
       description: |-
         Lists the people that have starred the repository.
 
-        You can also find out _when_ stars were created by passing the following custom [media type](https://docs.github.com/enterprise-server@3.2/rest/overview/media-types/) via the `Accept` header:
+        You can also find out _when_ stars were created by passing the following custom [media type](https://docs.github.com/enterprise-server@3.2/rest/overview/media-types/) via the `Accept` header: `application/vnd.github.star+json`.
       tags:
       - activity
       operationId: activity/list-stargazers-for-repo
@@ -66481,7 +66489,7 @@ paths:
       description: |-
         Lists repositories the authenticated user has starred.
 
-        You can also find out _when_ stars were created by passing the following custom [media type](https://docs.github.com/enterprise-server@3.2/rest/overview/media-types/) via the `Accept` header:
+        You can also find out _when_ stars were created by passing the following custom [media type](https://docs.github.com/enterprise-server@3.2/rest/overview/media-types/) via the `Accept` header: `application/vnd.github.star+json`.
       tags:
       - activity
       operationId: activity/list-repos-starred-by-authenticated-user
@@ -67942,7 +67950,7 @@ paths:
       description: |-
         Lists repositories a user has starred.
 
-        You can also find out _when_ stars were created by passing the following custom [media type](https://docs.github.com/enterprise-server@3.2/rest/overview/media-types/) via the `Accept` header:
+        You can also find out _when_ stars were created by passing the following custom [media type](https://docs.github.com/enterprise-server@3.2/rest/overview/media-types/) via the `Accept` header: `application/vnd.github.star+json`.
       tags:
       - activity
       operationId: activity/list-repos-starred-by-user