Invalid repo urls after change username

[shadowspore]

• Gitea version (or commit ref): 1.12.0+dev-239-g391e0638c
• Git version: 2.25.0
• Operating system:
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (https://try.gitea.io/testNewUsername)
  • No
  • Not relevant
• Log gist:

Description

After change username, user repo urls wouldn't updated.

Screenshots

[shadowspore]

I fixed this by adding the following code at the end of the models.ChangeUserName func (tested on sqlite)

sess := x.NewSession()
defer sess.Close()
if err = sess.Begin(); err != nil {
	return err
}

if _, err = sess.Exec("UPDATE `repository` SET owner_name=? WHERE owner_name=?", newUserName, u.Name); err != nil {
	return fmt.Errorf("Change repo owner name: %v", err)
}

return sess.Commit()

[zeripath]

any chance you could send a PR?