Update the link to the symfony docs from 4.4 to 5.x

docs/links/symfony_docs_4.py

@@ -0,0 +1,7 @@
+from . import link
+
+link_name = "Symfony 4 documentation"
+link_text = "Symfony 4 documentation"
+link_url = "https://symfony.com/doc/4.4/index.html"
+
+link.xref_links.update({link_name: (link_text, link_url)})

docs/links/symfony_docs_5.py

@@ -0,0 +1,7 @@
+from . import link
+
+link_name = "Symfony 5 documentation"
+link_text = "Symfony 5 documentation"
+link_url = "https://symfony.com/doc/5.x/index.html"
+
+link.xref_links.update({link_name: (link_text, link_url)})

docs/plugins/getting_started.rst

@@ -1,7 +1,7 @@
 Getting started with Plugins
 ############################
 
-Plugins are Symfony bundles that can extend the capability of Mautic. They can be very simple or complex and have access to leverage nearly all that Symfony offers. Just as a reminder, this covers the basics. If you require more advanced features of Symfony, the :xref:`Symfony 4 documentation` is a valuable resource.
+Plugins are Symfony bundles that can extend the capability of Mautic. They can be very simple or complex and have access to leverage nearly all that Symfony offers. Just as a reminder, this covers the basics. If you require more advanced features of Symfony, the :xref:`Symfony 5 documentation` is a valuable resource.
 
 .. note:: Plugins install into the ``plugins/`` directory. Namespace all classes with ``MauticPlugin\[Plugin Folder Name]\``.