enable staticcheck QFxxxx rules (#34064)

modules/markup/common/linkify.go

@@ -85,9 +85,10 @@ func (s *linkifyParser) Parse(parent ast.Node, block text.Reader, pc parser.Cont
 		} else if lastChar == ')' {
 			closing := 0
 			for i := m[1] - 1; i >= m[0]; i-- {
-				if line[i] == ')' {
+				switch line[i] {
+				case ')':
 					closing++
-				} else if line[i] == '(' {
+				case '(':
 					closing--
 				}
 			}