GraphQL schema update

Author: Octomerger

data/graphql/ghae/schema.docs-ghae.graphql

@@ -84,20 +84,6 @@
     - Mutation.createContentAttachment
   owning_teams:
     - '@github/feature-lifecycle'
-- title: Pinned Issues Preview
-  description: This preview adds support for pinned issues.
-  toggled_by: ':elektra-preview'
-  announcement: null
-  updates: null
-  toggled_on:
-    - Repository.pinnedIssues
-    - PinnedIssue
-    - PinnedIssueEdge
-    - PinnedIssueConnection
-    - Mutation.pinIssue
-    - Mutation.unpinIssue
-  owning_teams:
-    - '@github/pe-pull-requests'
 - title: Labels Preview
   description: >-
     This preview adds support for adding, updating, creating and deleting

data/graphql/ghes-3.1/graphql_previews.enterprise.yml

@@ -1,6 +1,6 @@
 ---
 upcoming_changes:
-  - location: Migration.uploadUrlTemplate
+  - location: LegacyMigration.uploadUrlTemplate
     description: '`uploadUrlTemplate` will be removed. Use `uploadUrl` instead.'
     reason:
       '`uploadUrlTemplate` is being removed because it is not a standard URL and