chore: finalize promote for source-sendgrid (#76335)

Co-authored-by: octavia-squidington-iii <90398440+octavia-squidington-iii@users.noreply.github.com>
Co-authored-by: Octavia Squidington III <octavia-squidington-iii@users.noreply.github.com>

Author: octavia-bot[bot]

airbyte-integrations/connectors/source-sendgrid/metadata.yaml

@@ -10,10 +10,10 @@ data:
   connectorSubtype: api
   connectorType: source
   definitionId: fbb5fbe2-16ad-4cf4-af7d-ff9d9c316c87
-  dockerImageTag: 1.3.28-rc.5
+  dockerImageTag: 1.3.28
   releases:
     rolloutConfiguration:
-      enableProgressiveRollout: true
+      enableProgressiveRollout: false
     breakingChanges:
       1.0.0:
         message: This release makes several changes that upgrade the Sendgrid connector. The configuration options have been renamed to `api_key` and `start_date`. `start_date` is now required. The `unsubscribe_groups` stream has been removed. It was the same as `suppression_groups`. You can use that and get the same data. The `single_sends` stream has been renamed `singlesend_stats`. This is closer to the data and API. The `segments` stream has been upgraded to use the Sendgrid 2.0 API because the older one has been deprecated. The schema has changed as a result. To ensure a smooth upgrade, please refresh your schemas and reset your data before resuming syncs.

docs/integrations/sources/sendgrid.md

@@ -105,6 +105,7 @@ If you encounter 403 errors, check the following:
 
 | Version | Date       | Pull Request                                             | Subject                                                                                                                                                                                                                                           |
 |:--------|:-----------| :------------------------------------------------------- |:--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| 1.3.28 | 2026-04-14 | [76335](https://github.com/airbytehq/airbyte/pull/76335) | Promoted release candidate to GA |
 | 1.3.28-rc.5 | 2026-04-13 | [74713](https://github.com/airbytehq/airbyte/pull/74713) | Add HTTPAPIBudget rate limiting (Phase 2) with concurrency=6 |
 | 1.3.28-rc.4 | 2026-04-12 | [74713](https://github.com/airbytehq/airbyte/pull/74713) | Add concurrency_level for parallel stream processing (concurrency=6) |
 | 1.3.27 | 2026-03-24 | [75331](https://github.com/airbytehq/airbyte/pull/75331) | Update dependencies |