Update Security String to 2021-08-01

Bug: 191053489
Change-Id: I704c163481698332aea96919eea01209acedb133
Merged-In: Ieba9625ca0ccedf285209954f1e766b20455c32f
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 0842806..b06dd18 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -181,7 +181,7 @@
     #  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 := 2021-07-01
+      PLATFORM_SECURITY_PATCH := 2021-08-01
 endif
 
 ifndef PLATFORM_BASE_OS