Update newheader.md

[RatinCN]

Is here forgot a P?

[prmerger-automator]

@RatinCN : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[DJm00n]

Should be:

#pragma pack(2)
typedef struct tagNEWHEADER {
    WORD    Reserved;
    WORD    ResType;
    WORD    ResCount;
} NEWHEADER, *LPNEWHEADER;
#pragma pack()