Backport pull request #11677 from jellyfin/release-10.9.z

 Properly dispose dbContext in MigrateUserDb

Original-merge: 9b98638b2bf516cbed91ad54d20e9d07ceb69d4e

Merged-by: nielsvanvelzen <nielsvanvelzen@users.noreply.github.com>

Backported-by: Joshua M. Boniface <joshua@boniface.me>

Jellyfin.Server/Migrations/Routines/MigrateUserDb.cs

@@ -67,7 +67,7 @@ namespace Jellyfin.Server.Migrations.Routines
             using (var connection = new SqliteConnection($"Filename={Path.Combine(dataPath, DbFilename)}"))
             {
                 connection.Open();
-                var dbContext = _provider.CreateDbContext();
+                using var dbContext = _provider.CreateDbContext();
 
                 var queryResult = connection.Query("SELECT * FROM LocalUsersv2");