Version 1.21.0-dev.11.1

Cherry-pick f9c9c4e767e4b9538cf6e76e7327b7683235a06e into dev
diff --git a/tools/VERSION b/tools/VERSION
index 99f11c9..3432258 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -29,4 +29,4 @@
 MINOR 21
 PATCH 0
 PRERELEASE 11
-PRERELEASE_PATCH 0
+PRERELEASE_PATCH 1