fix table name typo on SQL (#5562)

* fix table name typo on SQL

* fix reserved word user when on mssql

models/migrations/v75.go

@@ -11,7 +11,7 @@ import (
 
 func clearNonusedData(x *xorm.Engine) error {
 	condDelete := func(colName string) builder.Cond {
-		return builder.NotIn(colName, builder.Select("id").From("user"))
+		return builder.NotIn(colName, builder.Select("id").From("`user`"))
 	}
 
 	if _, err := x.Exec(builder.Delete(condDelete("uid")).From("team_user")); err != nil {
@@ -22,7 +22,7 @@ func clearNonusedData(x *xorm.Engine) error {
 		return err
 	}
 
-	if _, err := x.Exec(builder.Delete(condDelete("user_id")).From("stop_watch")); err != nil {
+	if _, err := x.Exec(builder.Delete(condDelete("user_id")).From("stopwatch")); err != nil {
 		return err
 	}