minor symfony#17005 [HttpKernel] Mention the PSR-7 resolver (javiereguiluz)

This PR was merged into the 5.4 branch.

Discussion
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[HttpKernel] Mention the PSR-7 resolver

Fixes symfony#16514.

Commits
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50562e8 [HttpKernel] Mention the PSR-7 resolver

Author: javiereguiluz

controller/argument_value_resolver.rst

@@ -54,6 +54,12 @@ In addition, some components and official bundles provide other value resolvers:
     can be set to ``null`` in case  the controller can be accessed by anonymous
     users. It requires installing the :doc:`SecurityBundle </security>`.
 
+PSR-7 Objects Resolver:
+    Injects a Symfony HttpFoundation ``Request`` object created from a PSR-7 object
+    of type :class:`Psr\\Http\\Message\\ServerRequestInterface`,
+    :class:`Psr\\Http\\Message\\RequestInterface` or :class:`Psr\\Http\\Message\\MessageInterface`.
+    It requires installing :doc:`the PSR-7 Bridge </components/psr7>`_ component.
+
 Adding a Custom Value Resolver
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