Update file finder results exclusion criteria (#56640)

Author: kyanny

content/search-github/searching-on-github/finding-files-on-github.md

@@ -28,7 +28,7 @@ topics:
 
 ## Customizing excluded files
 
-By default, file finder results do not include files in the following directories if they exist at your repository root:
+By default, file finder results do not include files in the following directories:
 
 * `.git`
 * `.hg`