minor #21549 CLI Doc : Add missing config setting for CORS (kaipiyann)

This PR was submitted for the 7.3 branch but it was merged into the 6.4 branch instead.

Discussion
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 CLI Doc : Add  missing config setting for CORS

Document CORS setting for the Symfony CLI Local server.

Commits
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ef5142a CLI Doc : Add  missing config setting for CORS

Author: javiereguiluz

setup/symfony_cli.rst

@@ -580,6 +580,8 @@ The ``.symfony.local.yaml`` file provides advanced configuration options:
         p12: path/to/custom-cert.p12
         # toggle GZIP compression
         use_gzip: true
+        # enable Cross-origin resource sharing (CORS) for all request
+        allow_cors: true
 
     # run the server in the background
     daemon: true