Error code link is dead, replace it with '8.0' version
@@ -141,7 +141,7 @@ impl Statement {
fn last_error_type(&self) -> DatabaseErrorKind {
let last_error_number = unsafe { ffi::mysql_stmt_errno(self.stmt.as_ptr()) };
// These values are not exposed by the C API, but are documented
- // at https://dev.mysql.com/doc/refman/5.7/en/error-messages-server.html
+ // at https://dev.mysql.com/doc/refman/8.0/en/server-error-reference.html
// and are from the ANSI SQLSTATE standard
match last_error_number {
1062 | 1586 | 1859 => DatabaseErrorKind::UniqueViolation,
