Version 3.9.0-78.0.dev

Merge 35e8b9ba0bf6af905759f757c0b6060b98775fca into dev
diff --git a/tools/VERSION b/tools/VERSION
index 5429ee7..cc9e05d 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -23,9 +23,9 @@
 #  * Making cherry-picks to stable channel
 #     - increase PATCH by 1
 #
-CHANNEL main
+CHANNEL dev
 MAJOR 3
 MINOR 9
 PATCH 0
-PRERELEASE 0
+PRERELEASE 78
 PRERELEASE_PATCH 0