[BUGFIX] Add missing backslashes to class name in rst file

Namespace and classname have not been separated by a backslash,
making that class not easy to identify.

Resolves: #79341
Releases: master, 8.7
Change-Id: Ic86086524cb10c470296facef25759f14c35cc11
Reviewed-on: https://review.typo3.org/54960


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>

typo3/sysext/core/Documentation/Changelog/8.6/Deprecation-79341-MethodsRelatedToRichtextConfiguration.rst

@@ -11,8 +11,8 @@ Description
 
 The following methods and method arguments have been deprecated:
 
-* Method :php:`\TYPO3\CMS\Backend\UtilityBackendUtility::getSpecConfParametersFromArray()`
-* Method :php:`\TYPO3\CMS\Backend\UtilityBackendUtility::RTEsetup()`
+* Method :php:`\TYPO3\CMS\Backend\Utility\BackendUtility::getSpecConfParametersFromArray()`
+* Method :php:`\TYPO3\CMS\Backend\Utility\BackendUtility::RTEsetup()`
 * Second argument :php:`$specConf` of :php:`\TYPO3\CMS\Core\Html\RteHtmlParser->RTE_transform()`
 
 
@@ -34,4 +34,4 @@ Migration
 If not otherwise possible, class :php:`\TYPO3\CMS\Core\Configuration\Richtext` can be used to fetch richtext configuration.
 Be aware this class is marked @internal and is likely to change or vanish in TYPO3 v9 again.
 
-.. index:: Backend, RTE
\ No newline at end of file
+.. index:: Backend, RTE