Add bug-14351.php to make-lint exclude list

The test data file contains intentionally invalid PHP (catch $this,
global $this) that triggers lint errors, so it needs to be excluded.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: phpstan-bot

Makefile

@@ -134,6 +134,7 @@ lint:
 		--exclude tests/PHPStan/Rules/EnumCases/data/bug-14252.php \
 		--exclude tests/PHPStan/Rules/Functions/data/bug-14241.php \
 		--exclude tests/PHPStan/Rules/Variables/data/bug-14349.php \
+		--exclude tests/PHPStan/Rules/Variables/data/bug-14351.php \
 		src tests
 
 install-paratest: