Small grammar change (#23383)

Spotted it while upgrading my server and checking the logs

server/boards/services/store/sqlstore/schema_table_migration.go

@@ -27,7 +27,7 @@ func (s *SQLStore) EnsureSchemaMigrationFormat() error {
 	}
 
 	if !migrationNeeded {
-		s.logger.Info("Schema migration table is correct format")
+		s.logger.Info("Schema migration table is in correct format")
 		return nil
 	}