fix conflict: update release notes date for 4.12.0

Author: ayodeko

source/release-notes/index-4x.rst

@@ -12,7 +12,7 @@ This section summarizes the most important features of each Wazuh 4.x release.
 Wazuh version                                  Release date
 =============================================  ====================
 :doc:`4.12.1 </release-notes/release-4-12-1>`  TBD
-:doc:`4.12.0 </release-notes/release-4-12-0>`  TBD
+:doc:`4.12.0 </release-notes/release-4-12-0>`  7 May 2025
 :doc:`4.11.2 </release-notes/release-4-11-2>`  1 April 2025
 :doc:`4.11.1 </release-notes/release-4-11-1>`  12 March 2025
 :doc:`4.11.0 </release-notes/release-4-11-0>`  20 February 2025