Cleanup: spelling in comments, correct outdated comments

source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c

@@ -2064,7 +2064,7 @@ static bool lineart_triangle_edge_image_space_occlusion(SpinLock *UNUSED(spl),
   dot_r = dot_v3v3_db(Rv, tri->gn);
   dot_f = dot_v3v3_db(Cv, tri->gn);
 
-  /* NOTE(Yiming): When we don't use `dot_f==0` here, it's theoretically possibile that _some_
+  /* NOTE(Yiming): When we don't use `dot_f==0` here, it's theoretically possible that _some_
    * faces in perspective mode would get erroneously caught in this condition where they really are
    * legit faces that would produce occlusion, but haven't encountered those yet in my test files.
    */