Update Engine revision to 1cc4b2d280f5705c7901c10676eae8bdb3142631 for beta release 3.9.0-0.2.pre (#123357)

diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index 3bcfa00..cc38a78 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-dec409804a77c9fc71d894d8c818682c744c78b6
+1cc4b2d280f5705c7901c10676eae8bdb3142631