minor #20608 Update web_server_configuration.rst: Adding syntax highlighting (ThomasLandauer)

This PR was merged into the 6.4 branch.

Discussion
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Update web_server_configuration.rst: Adding syntax highlighting

Page: https://symfony.com/doc/6.4/setup/web_server_configuration.html#caddy

`nginx` is probably better than nothing ;-)

Commits
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8cf4739 Update web_server_configuration.rst: Adding syntax highlighting

Author: javiereguiluz

setup/web_server_configuration.rst

@@ -195,7 +195,7 @@ Caddy
 
 When using Caddy on the server, you can use a configuration like this:
 
-.. code-block:: text
+.. code-block:: nginx
 
     # /etc/caddy/Caddyfile
     example.com, www.example.com {