Apply suggestion from @jrfnl

Co-authored-by: Juliette <663378+jrfnl@users.noreply.github.com>

Author: diimpp

squizlabs/php_codesniffer/3.6/phpcs.xml.dist

@@ -16,6 +16,6 @@
     <file>src/</file>
     <file>tests/</file>
 
-    <exclude-pattern>config/reference.php</exclude-pattern>
+    <exclude-pattern>config/reference\.php$</exclude-pattern>
 
 </ruleset>