patch 8.1.2366: using old C style comments

Problem:    Using old C style comments.
Solution:   Use // comments where appropriate.
diff --git a/src/version.h b/src/version.h
index b94ab7e..9206968 100644
--- a/src/version.h
+++ b/src/version.h
@@ -24,7 +24,7 @@
 #define VIM_VERSION_BUILD_STR		"282"
 #define VIM_VERSION_PATCHLEVEL		 0
 #define VIM_VERSION_PATCHLEVEL_STR	"0"
-/* Used by MacOS port should be one of: development, alpha, beta, final */
+// Used by MacOS port should be one of: development, alpha, beta, final
 #define VIM_VERSION_RELEASE		final
 
 /*