include: Fix the spelling of some comments.

include/objbase.h

@@ -146,7 +146,7 @@
  *  - Each method is declared as a pointer to function field in the jump table. The implementation
  *    will fill this jump table with appropriate values, probably using a static variable, and
  *    initialize the lpVtbl field to point to this variable.
- *  - The IDirect3D_Xxx macros then just derefence the lpVtbl pointer and use the function pointer
+ *  - The IDirect3D_Xxx macros then just dereference the lpVtbl pointer and use the function pointer
  *    corresponding to the macro name. This emulates the behavior of a virtual table and should be
  *    just as fast.
  *  - This C code should be quite compatible with the Windows headers both for code that uses COM

include/winbase.h

@@ -1262,7 +1262,7 @@ typedef struct COPYFILE2_EXTENDED_PARAMETERS
 #define ACTCTX_FLAG_SOURCE_IS_ASSEMBLYREF         (0x00000040)
 #define ACTCTX_FLAG_HMODULE_VALID                 (0x00000080)
 
-/* flags to DeactiveActCtx */
+/* flags to DeactivateActCtx */
 #define DEACTIVATE_ACTCTX_FLAG_FORCE_EARLY_DEACTIVATION  (0x00000001)
 
 /* flags to FindActCtxSection{Guid,String[AW]} */