Fix parenthesis escaping bug (#5633)

fix https://github.com/FreshRSS/FreshRSS/issues/5632
In the SQL search, parentheses should not be escaped. Escaped parenthesis in the SQL search were tolerated by PostgreSQL but not by SQLite.

tests/app/Models/SearchTest.php

@@ -330,8 +330,8 @@ class SearchTest extends PHPUnit\Framework\TestCase {
 			[
 				'intitle:"\\(test\\)"',
 				'(e.title LIKE ? )',
-				['%\\(test\\)%'],
-			]
+				['%(test)%'],
+			],
 		];
 	}
 }