Update SPL to 2021-12-01

Bug: 202436544
Change-Id: I5f0dea3c6fc94a966c3676cd6ea3cd2684487aff
Merged-In: Ib03873315839e4858f93d1ebbbc17054d46246c9
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 437c173..0c7e803 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -231,7 +231,7 @@
     #  It must be of the form "YYYY-MM-DD" on production devices.
     #  It must match one of the Android Security Patch Level strings of the Public Security Bulletins.
     #  If there is no $PLATFORM_SECURITY_PATCH set, keep it empty.
-      PLATFORM_SECURITY_PATCH := 2021-11-01
+      PLATFORM_SECURITY_PATCH := 2021-12-01
 endif
 
 ifndef PLATFORM_SECURITY_PATCH_TIMESTAMP