Remove extraneous entry for 3.12.0.0

Author: Kleidukos

Cabal/ChangeLog.md

@@ -8,7 +8,6 @@
 * See https://github.com/haskell/cabal/blob/master/release-notes/Cabal-3.12.1.0.md
 
 # 3.12.0.0 [Francesco Ariis](mailto:fa-ml@ariis.it) May 2024
-# 3.12.0.0 [Francesco Ariis](mailto:fa-ml@ariis.it) March 2024
 * See https://github.com/haskell/cabal/blob/master/release-notes/Cabal-3.12.0.0.md
 
 # 3.10.3.0 [Hécate](mailto:hecate+github@glitchbra.in) January 2024