Bump maccore. (#10427)

New commits in xamarin/maccore:

* xamarin/maccore@55a700bb5b [build] Add /restore to Xamarin.Analysis build (#2366)
* xamarin/maccore@2d9f8a9685 Bump to xamarin/xamarin-analysis@95245313 (#2362)
* xamarin/maccore@428964bf32 [Device tests] Remove all the code related with vsts pipelines. (#2344)
* xamarin/maccore@3875d125da Ignore vscode config files. (#2343)
* xamarin/maccore@55ca0540ef [Actions] Add a rebase action. (#2341)
* xamarin/maccore@d0bad0f87a [Actions] Add the backport action. (#2340)

Diff: 5133d2cea1..55a700bb5b

Co-authored-by: Peter Collins <pecolli@microsoft.com>

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 := 55a700bb5ba3c092f511075d479d82ecb10fa5fe
 NEEDED_MACCORE_BRANCH := main
 
 MACCORE_DIRECTORY := maccore