minor #19272 Update Docker page with instructions for Mac users (codedmonkey)

This PR was submitted for the 6.4 branch but it was merged into the 5.4 branch instead.

Discussion
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Update Docker page with instructions for Mac users

As explained in symfony-cli/symfony-cli#350, Mac users need to grant specific permissions for the Docker integration of the Symfony CLI to work.

Commits
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eff82f6 Update Docker page with instructions for Mac users

Author: javiereguiluz

setup/docker.rst

@@ -51,4 +51,9 @@ If you're using the :ref:`symfony binary web server <symfony-local-web-server>`
 then it can automatically detect your Docker services and expose them as environment
 variables. See :ref:`symfony-server-docker`.
 
+.. note::
+
+    Mac users need to explicitly allow the default Docker socket to be used for the Docker integration to work as explained in the `Docker documentation`_.
+
 .. _`https://github.com/dunglas/symfony-docker`: https://github.com/dunglas/symfony-docker
+.. _`Docker documentation`: https://docs.docker.com/desktop/mac/permission-requirements/