[TASK] Remove notice for sphinx deprecation

Documentation/Includes.rst.txt

@@ -1,12 +1 @@
 ..  You can put central messages to display on all pages here
-
-..  note::
-    This version of the guide covers the new PHP-based rendering of
-    Documentation with the TYPO3 Documentation theme.
-
-    If the project you are looking at has a file
-    :ref:`Documentation/guides.xml <guides-xml>` it is using the new rendering.
-
-    Otherwise, consider to :ref:`migrate <migrate>` the Documentation or head
-    over to the legacy version of this guide:
-    :ref:`How to document, Sphinx based <h2document-sphinx:start>`.

composer.json

@@ -4,6 +4,6 @@
     "description": "Writing documentation",
     "license": "OPL-1.0",
     "require": {
-      "typo3/cms-core": "^11.5"
+      "typo3/cms-core": "^13.4"
     }
 }