Bump engine.version. (#179467)

We need to bump the engine version once more so that we're pointing at artifacts that were actually built for release (and therefore are signed.
diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index e5de833..62b9f56 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-b3770ec6f4337bcfe98ef80e5140a3d1bc8e1f85
\ No newline at end of file
+b5cdf57426107e7a8eebf469a017833e01389438
\ No newline at end of file