Version 1.22.0-dev.9.1

Cherry-pick 1d6bd5255d14ed822eb0f2e58a7b2013309e9c23 to dev
diff --git a/tools/VERSION b/tools/VERSION
index eaf108ed..d8a18f8 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 22
 PATCH 0
 PRERELEASE 9
-PRERELEASE_PATCH 0
+PRERELEASE_PATCH 1