minor #16958 Use --webapp flag instead of --full (Arman-Hosseini)

This PR was merged into the 4.4 branch.

Discussion
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Use --webapp flag instead of --full

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Commits
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d68d7ee Use --webapp flag instead of --full

Author: javiereguiluz

setup.rst

@@ -50,13 +50,13 @@ application:
 .. code-block:: terminal
 
     # run this if you are building a traditional web application
-    $ symfony new my_project_directory --version=4.4 --full
+    $ symfony new my_project_directory --version=4.4 --webapp
 
     # run this if you are building a microservice, console application or API
     $ symfony new my_project_directory --version=4.4
 
 The only difference between these two commands is the number of packages
-installed by default. The ``--full`` option installs all the packages that you
+installed by default. The ``--webapp`` option installs all the packages that you
 usually need to build web applications, so the installation size will be bigger.
 
 If you're not using the Symfony binary, run these commands to create the new