minor #3757 Fixed a typo in the request formats configuration page (gquemener)

This PR was merged into the master branch.

Discussion
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Fixed a typo in the request formats configuration page

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.5
| Fixed tickets |

Commits
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efbe0f3 Fixed a typo

Author: weaverryan

cookbook/request/mime_type.rst

@@ -21,7 +21,7 @@ and corresponding MIME type.
 Configure your New Format
 -------------------------
 
-The FrameworkBundle registers a subscriber that will add formats to incomming requests.
+The FrameworkBundle registers a subscriber that will add formats to incoming requests.
 
 All you have to do is to configure the ``jsonp`` format: