Cleanup: Fix comment warning

When compiling on Ubuntu this comment could generate
thousands of warning lines, the comment is fixed now.

Introduced by 8e059b569b

Pull Request: https://projects.blender.org/blender/blender/pulls/108676

source/blender/makesdna/DNA_scene_types.h

@@ -2255,7 +2255,7 @@ typedef enum eSnapFlag {
   SCE_SNAP_ROTATE = (1 << 1),
   SCE_SNAP_PEEL_OBJECT = (1 << 2),
   /** Project individual elements instead of whole object. */
-  /* SCE_SNAP_PROJECT = (1 << 3), DEPRECATED * /
+  /** SCE_SNAP_PROJECT = (1 << 3), DEPRECATED */
   /** Was `SCE_SNAP_NO_SELF`, but self should be active. */
   SCE_SNAP_NOT_TO_ACTIVE = (1 << 4),
   SCE_SNAP_ABS_GRID = (1 << 5),