[TASK] Optimize structure of ChangeLog documentation

Have a slightly different menu setup of the rendered
documentation, especially affects docs.typo3.org

Change-Id: I357c1f59ff7606361b680128d5a3934c981a4f43
Resolves: #83325
Releases: master
Reviewed-on: https://review.typo3.org/55072


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>

typo3/sysext/core/Documentation/Changelog-8.rst

+:orphan:
+
+.. include:: Includes.txt
+
+============
+ChangeLog v8
+============
+
+Every change to the TYPO3 Core which might affect your site is documented here.
+
+.. toctree::
+   :titlesonly:
+
+   Changelog/8.7/Index
+   Changelog/8.6/Index
+   Changelog/8.5/Index
+   Changelog/8.4/Index
+   Changelog/8.3/Index
+   Changelog/8.2/Index
+   Changelog/8.1/Index
+   Changelog/8.0/Index

typo3/sysext/core/Documentation/Changelog-9.rst

+:orphan:
+
+.. include:: Includes.txt
+
+============
+ChangeLog v9
+============
+
+Every change to the TYPO3 Core which might affect your site is documented here.
+
+.. toctree::
+   :titlesonly:
+
+   Changelog/9.0/Index

typo3/sysext/core/Documentation/Changelog/master/Index.rst

 
 .. include:: ../../Includes.txt
 
-master changes
+master Changes
 ==============
 
 **Table of contents**

typo3/sysext/core/Documentation/Index.rst

 
 .. include:: Includes.txt
 
-===========================
-TYPO3 CMS Core ChangeLog v8
-===========================
+========================
+TYPO3 CMS Core ChangeLog
+========================
 
 :Rendered: |today|
 
 Every change to the TYPO3 Core which might affect your site is documented here.
 
 .. toctree::
-   :hidden:
+   :titlesonly:
 
    Sitemap/Index
-   Changelog/master/Index
-   Changelog/9.0/Index
-   Changelog/8.7/Index
-   Changelog/8.6/Index
-   Changelog/8.5/Index
-   Changelog/8.4/Index
-   Changelog/8.3/Index
-   Changelog/8.2/Index
-   Changelog/8.1/Index
-   Changelog/8.0/Index
+   Master
+   Changelog-9
+   Changelog-8
    Changelog/Howto

typo3/sysext/core/Documentation/Master.rst

+:orphan:
+
+.. include:: Includes.txt
+
+================
+ChangeLog master
+================
+
+Every change to the TYPO3 Core which might affect your site is documented here.
+
+.. toctree::
+   :titlesonly:
+
+   Changelog/master/Index