Fix typo

pkg/services/sqlstore/migrations/migrations.go

@@ -5,7 +5,7 @@ import . "github.com/grafana/grafana/pkg/services/sqlstore/migrator"
 // --- Migration Guide line ---
 // 1. Never change a migration that is committed and pushed to master
 // 2. Always add new migrations (to change or undo previous migrations)
-// 3. Some migraitons are not yet written (rename column, table, drop table, index etc)
+// 3. Some migrations are not yet written (rename column, table, drop table, index etc)
 
 func AddMigrations(mg *Migrator) {
 	addMigrationLogMigrations(mg)