Fix typo in doc/technical/InterestMessage.txt.   Refs #100255
Fix typo in doc/technical/InterestMessage.txt.   Refs #100255

ebollens/ccnmp,cawka/ndnx,cawka/ndnx,svartika/ccnx,cawka/ndnx,cawka/ndnx,ebollens/ccnmp,ebollens/ccnmp,svartika/ccnx,svartika/ccnx,svartika/ccnx,svartika/ccnx,cawka/ndnx,ebollens/ccnmp,svartika/ccnx,svartika/ccnx