[DOCS] Correct admonition syntax in changelog file

Related: #106307
Releases: main

Resolves: #108270
Change-Id: I1553cb52faa281a9e0f5dc0dd25acd588d2e0081
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/91829
Reviewed-by: Lina Wolf <112@linawolf.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Sven Liebert <mail@sven-liebert.de>
Tested-by: Garvin Hicking <garvin@hick.ing>
Tested-by: Sven Liebert <mail@sven-liebert.de>
Reviewed-by: Garvin Hicking <garvin@hick.ing>
Tested-by: Lina Wolf <112@linawolf.de>

Author: Elias Häußler

typo3/sysext/core/Documentation/Changelog/14.0/Breaking-106307-UseStrongerCryptographicAlgorithmForHMAC.rst

@@ -92,13 +92,14 @@ Execute the database analyzer in the Install Tool or run :bash:`vendor/bin/typo3
 - File dump and show image URLs regenerate automatically on next access
 - External references to file/image URLs must be updated
 
-> [!IMPORTANT]
-> Existing links with `&cHash=` URL parameters will become invalid and respond with
-> an HTTP 404 error. Search engines first need to crawl the site and discover the
-> new URLs having the longer cache-hash value. This probably has an impact on SEO.
->
-> :php:`$GLOBALS['TYPO3_CONF_VARS']['FE']['cacheHash']['fallbackToLegacyHash'] = true;`
-> can be used to still allow the legacy MD5 cache-hash during frontend requests.
+..  important::
+
+    Existing links with `&cHash=` URL parameters will become invalid and respond with
+    an HTTP 404 error. Search engines first need to crawl the site and discover the
+    new URLs having the longer cache-hash value. This probably has an impact on SEO.
+
+    :php:`$GLOBALS['TYPO3_CONF_VARS']['FE']['cacheHash']['fallbackToLegacyHash'] = true;`
+    can be used to still allow the legacy MD5 cache-hash during frontend requests.
 
 **Sessions:**