Roll engine be973ea1961..72c7a756722 (#24828)

72c7a7567 Prepend [NSLocale currentLocale] for first locale on iOS to ensure countryCode exists. Allow language-only locales.
diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index d2be36c..671affd 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-be973ea196127383f356d39be466e2f3bd163083
+72c7a7567228cdaf8b7aa4a9e3d212ef9d4cc0ed