Fix setting version table in dump (#15753)

* Fix setting version table in dump

As noted on Discord there is a problem with gitea dump where the version table
is not being dumped correctly.

This is due to a missing pointer in the TableInfo.

This PR fixes this.

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Update models_test.go

models/models.go

@@ -320,7 +320,7 @@ func DumpDatabase(filePath, dbType string) error {
 		ID      int64 `xorm:"pk autoincr"`
 		Version int64
 	}
-	t, err := x.TableInfo(Version{})
+	t, err := x.TableInfo(&Version{})
 	if err != nil {
 		return err
 	}