Version bump to BP1A.250305.020.A1 [core/build_id.mk]

Change-Id: Ibd82092054dec0d7ee8da9cfd535bba9852bef54
diff --git a/core/build_id.mk b/core/build_id.mk
index c642e4a..9fe5e8f 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-BUILD_ID=BP1A.250305.020
+BUILD_ID=BP1A.250305.020.A1