Apply suggestion from @hekota

Co-authored-by: Helena Kotas <hekotas@microsoft.com>

Author: llvm-beanz

utils/embed_header.py

@@ -11,7 +11,7 @@
       "<escaped line 2>"
       ...;
 
-The generated file declares a single variable named ``Data`` at namespace
+The generated file declares a single variable named ``Data`` at file
 scope. The intent is for the file to be ``#include``-ed inside a wrapping
 namespace by the consumer.
 """