Version bump to BP2A.250605.031.A1 [core/build_id.mk]

Change-Id: Ie89de371c39b35351a8d8abb125906441303b549
diff --git a/core/build_id.mk b/core/build_id.mk
index 18f6539..3eb4cb1 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=BP2A.250605.031
+BUILD_ID=BP2A.250605.031.A1