[BUGFIX] Use proper syntax for RST code-block

codeblock -> code-block

Resolves: #88790
Releases: master, 9.5
Change-Id: I51f30b30ef7344e1b66bd5ed354d3bfe60074a57
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61309


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>

typo3/sysext/core/Documentation/Changelog/9.5/Deprecation-85970-FileContentObject.rst

@@ -44,7 +44,7 @@ However due to the flexibility of custom cObjects, an extension author could jus
 the functionality in a custom extension within minutes.
 See this example for ext:frontend where the registration resides in :file:`ext_localconf.php`.
 
-.. codeblock:: php
+.. code-block:: php
 
    $GLOBALS['TYPO3_CONF_VARS']['FE']['ContentObjects'] = array_merge(
       $GLOBALS['TYPO3_CONF_VARS']['FE']['ContentObjects'],