outbin: be consistent in spelling "Intel hex" with those caps
outbin: be consistent in spelling "Intel hex" with those caps

The documentation uses "Intel hex", with that capitalization (Intel
being a proper noun, hex being descriptive) so make the help message
match.

Signed-off-by: H. Peter Anvin <8a453bad9912ffe59bc0f0b8abe03df9be19379e@zytor.com>

letolabs/nasm,projedi/nasm,techkey/nasm,projedi/nasm,Distrotech/nasm,projedi/nasm,techkey/nasm,techkey/nasm,letolabs/nasm,letolabs/nasm,turingstudio/nasm,turingstudio/nasm,Distrotech/nasm,Distrotech/nasm,techkey/nasm,turingstudio/nasm,Distrotech/nasm,projedi/nasm,turingstudio/nasm,techkey/nasm,projedi/nasm