minor #8419 Update finder.rst (salarmehr)

This PR was submitted for the 3.3 branch but it was merged into the 2.7 branch instead (closes #8419).

Discussion
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Update finder.rst

to make it "same as above"

Commits
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d910886 Update finder.rst

Author: wouterj

components/finder.rst

@@ -83,7 +83,7 @@ Search in several locations by chaining calls to
 :method:`Symfony\\Component\\Finder\\Finder::in`::
 
     // search inside *both* directories
-    $finder->files()->in(array(__DIR__, '/elsewhere'));
+    $finder->in(array(__DIR__, '/elsewhere'));
 
     // same as above
     $finder->in(__DIR__)->in('/elsewhere');