fix(mysql): quote groups reserved word in query replacer (dexidp#4580)

`groups` is a reserved word in MySQL >= 8.0.2, causing migration 13
to fail with a syntax error on `ALTER TABLE password ADD COLUMN groups`.

Fixes dexidp#4579

Signed-off-by: Michiel De Backker <mail@backkem.me>

Author: backkem

storage/sql/sql.go

@@ -95,7 +95,7 @@ var (
 			// For compound indexes (with two keys) even less.
 			{matchLiteral("text"), "varchar(384)"},
 			// Quote keywords and reserved words used as identifiers.
-			{regexp.MustCompile(`\b(keys)\b`), "`$1`"},
+			{regexp.MustCompile(`\b(keys|groups)\b`), "`$1`"},
 			// Change default timestamp to fit datetime.
 			{regexp.MustCompile(`0001-01-01 00:00:00 UTC`), "1000-01-01 00:00:00"},
 		},