[xcode12.2] [maccore] Bump maccore to get CredScan fixes (#9810)

New commits in xamarin/maccore:

* xamarin/maccore@5e97cc52a4 [xcode12][CredScan] Avoid scanning src/cfnetwork.cs due to false positives (#2325)

Diff: ba332d4d07..5e97cc52a4

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 := ba332d4d072e9addaad1d7c66adb13dbf42a6c7c
+NEEDED_MACCORE_VERSION := 5e97cc52a4dd7d4c2ed98fdfb0ba4e6d57c600ad
 NEEDED_MACCORE_BRANCH := xcode12
 
 MACCORE_DIRECTORY := maccore