Create openiddict5-to-6.md

docs/en/release-info/migration-guides/openiddict5-to-6.md

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+# OpenIddict 5.x to 6.x Migration Guide
+
+The 6.0 release of OpenIddict is a major release that introduces breaking changes.
+
+Check this blog [OpenIddict 6.0 general availability](https://kevinchalet.com/2023/12/18/openiddict-5-0-general-availability/) for the new features introduced in OpenIddict 6.0. and the [Migrate to OpenIddict 6.0](https://documentation.openiddict.com/guides/migration/50-to-60) for more information about the changes.
+
+In this guide, we will explain the changes you need to make to your ABP application.
+
+## Constant changes
+
+The following constants have been renamed:
+
+| Old Constant Name                                             | New Constant Name                                               |
+|---------------------------------------------------------------|-----------------------------------------------------------------|
+| `OpenIddictConstants.Permissions.Endpoints.LogoutPmar`        | `OpenIddictConstants.Permissions.Endpoints.EndSession`          |
+| `OpenIddictConstants.Permissions.Endpoints.Device`            | `OpenIddictConstants.Permissions.Endpoints.DeviceAuthorization` |
+
+That's all, It's a simple migration. If you have advanced usage of OpenIddict, Please check the [official migration guide](https://documentation.openiddict.com/guides/migration/50-to-60) for more information.