Notification: update copy since it's a past date (#11657)

* Notification: update copy since it's a past date

* Update readthedocs/projects/notifications.py

Co-authored-by: Santos Gallegos <[email protected]>

---------

Co-authored-by: Santos Gallegos <[email protected]>

Author: humitos

readthedocs/projects/notifications.py

@@ -162,12 +162,14 @@
     # Temporary notification until October 7th.
     Message(
         id=MESSAGE_PROJECT_ADDONS_BY_DEFAULT,
-        header=_("""Read the Docs Addons will be enabled by default on October 7th"""),
+        header=_(
+            """Read the Docs Addons were enabled by default on October 7th, 2024"""
+        ),
         body=_(
             textwrap.dedent(
                 """
                 Read the <a href="https://about.readthedocs.com/blog/2024/07/addons-by-default/" target="_blank">full announcement in our blog</a>
-                to know if your project will be affected and how to update.
+                to know if your project is affected and how to update.
                 """
             ).strip(),
         ),