Update Security String to 2023-09-05

Bug: 289414927
Ignore-AOSP-First: Future release prep (Internal first)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:838fbc4dd7190468ad68b92e3cb7b56fe7f3625f)
Merged-In: Ia5208702fc02d0e1ab53d1affc664363fba74a67
Change-Id: Ia5208702fc02d0e1ab53d1affc664363fba74a67
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 8dc4257..cecdc0e 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -104,7 +104,7 @@
     #  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 := 2023-08-05
+    PLATFORM_SECURITY_PATCH := 2023-09-05
 endif
 
 include $(BUILD_SYSTEM)/version_util.mk