[CFE/VM] Fix merge/typo for bump to kernel version 29 (#39783)

Before this fix, trying to run a dill with version 28 (with named types
in it) on a new VM would crash.

Change-Id: I47851c236332aa14511f595b4b129e6354b395a7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/113689
Commit-Queue: Jens Johansen <jensj@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Auto-Submit: Jens Johansen <jensj@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index 9b47683..36e6307 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-55406841525fba0dcb7fdf417bf021e96093459d
+cc88fa45dbf4c55bc23cecea17fb90f43bccf588