minor #18788 [Server] Fix typo in Symfony Local Web Server page (Damien Carrier)

This PR was merged into the 5.4 branch.

Discussion
----------

[Server] Fix typo in Symfony Local Web Server page

Hello,

I found a small typo in the [Symfony Local Web Server](https://symfony.com/doc/current/setup/symfony_server.html) page.
Fixing it.

Thanks for the reviews 🙏

Commits
-------

adb8786 [Server] Fix typo in Symfony Local Web Server page

Author: javiereguiluz

setup/symfony_server.rst

@@ -60,7 +60,7 @@ run the Symfony server in the background:
 
     On macOS, when starting the Symfony server you might see a warning dialog asking
     *"Do you want the application to accept incoming network connections?"*.
-    This happens when running unsigned appplications that are not listed in the
+    This happens when running unsigned applications that are not listed in the
     firewall list. The solution is to run this command that signs the Symfony binary:
 
     .. code-block:: terminal