Update 10.6 release date and migration links

Adjust release documentation for ABP 10.6 by updating the release notes date to 2026-07-27 and removing the Angular 22 upgrade guide entry from the migration guides index.

docs/en/release-info/migration-guides/index.md

@@ -10,7 +10,6 @@
 The following documents explain how to migrate your existing ABP applications. We write migration documents only if you need to take an action while upgrading your solution. Otherwise, you can easily upgrade your solution using the [abp update command](../upgrading.md).
 
 - [10.5 to 10.6](abp-10-6.md)
-- [Angular 22 and ABP 10.6 Upgrade Guide](abp-10-6-angular-22.md)
 - [10.4 to 10.5](abp-10-5.md)
 - [10.3 to 10.4](abp-10-4.md)
 - [10.x to 10.3](abp-10-3.md)

docs/en/release-info/release-notes.md

@@ -14,7 +14,7 @@ Also see the following notes about ABP releases:
 - [ABP Studio release notes](../studio/release-notes.md)
 - [Change logs for ABP pro packages](https://abp.io/pro-releases)
 
-## 10.6 (2026-07-07)
+## 10.6 (2026-07-27)
 
 See the detailed **[blog post / announcement](https://abp.io/community/announcements/announcing-abp-10-6-release-candidate-reoq6kzw)** for the v10.6 release.