Bump maccore.

New commits in xamarin/maccore:

* xamarin/maccore@2d9f8a9685 Bump to xamarin/xamarin-analysis@95245313 (xamarin#2362)
* xamarin/maccore@428964bf32 [Device tests] Remove all the code related with vsts pipelines. (xamarin#2344)
* xamarin/maccore@3875d125da Ignore vscode config files. (xamarin#2343)
* xamarin/maccore@55ca0540ef [Actions] Add a rebase action. (xamarin#2341)
* xamarin/maccore@d0bad0f87a [Actions] Add the backport action. (xamarin#2340)

Diff: https://github.com/xamarin/maccore/compare/5133d2cea1c52fb783f64ab2ba97c760cf33f5f4..2d9f8a96856fbd40f13a8e57df9c3d23e69602fb

mk/xamarin.mk

@@ -7,7 +7,7 @@ MONO_BRANCH    := $(shell cd $(MONO_PATH) 2> /dev/null && git symbolic-ref --sho
 endif
 
 ifdef ENABLE_XAMARIN
-NEEDED_MACCORE_VERSION := 5133d2cea1c52fb783f64ab2ba97c760cf33f5f4
+NEEDED_MACCORE_VERSION := 2d9f8a96856fbd40f13a8e57df9c3d23e69602fb
 NEEDED_MACCORE_BRANCH := main
 
 MACCORE_DIRECTORY := maccore