[TASK] Move ChangeLog RST file to proper location

The RST file used the review ID instead of correct issue #94861.
For convience, all breaking changes were collected for TYPO3 v11.0,
and this RST is moved accordingly - the behavior has been deprected
correctly in TYPO3 v10, however actually removing it in v11.0 was
forgotten.

Related: #94861
Releases: master
Change-Id: I03c9d3062dcd640cce9396805f99873d4be14d59
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70920


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>

typo3/sysext/core/Documentation/Changelog/11.4/Breaking-70528-DeprecatedFormMixinsRemoved.rst → typo3/sysext/core/Documentation/Changelog/11.0/Breaking-94861-DeprecatedFormMixinsRemoved.rst

 .. include:: ../../Includes.txt
 
 =================================================
-Breaking: #70528 - Deprecated form mixins removed
+Breaking: #94861 - Deprecated form mixins removed
 =================================================
 
-See :issue:`70528`
+See :issue:`94861`
 
 Description
 ===========