minor #19102 Revert "Fix the installation instructions of symfony/psr-http-message-bridge" (alexandre-daubois)

This PR was merged into the 5.4 branch.

Discussion
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Revert "Fix the installation instructions of symfony/psr-http-message-bridge"

Reverts #19022

Following the discussion on the original PR 🙂

Commits
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5c7a1e6 Revert "Fix the installation instructions of symfony/psr-http-message-bridge"

Author: javiereguiluz

components/psr7.rst

@@ -10,7 +10,7 @@ Installation
 
 .. code-block:: terminal
 
-    $ composer require symfony/psr-http-message-bridge:^2.3
+    $ composer require symfony/psr-http-message-bridge
 
 .. include:: /components/require_autoload.rst.inc