Update the link to NBitcoin repo #767

1. 
   bitcoinbrisbane commented at 9:52 PM on March 5, 2019: contributor

   NBitcoin official repo has changed.

2. Update the link to NBitcoin repo

   NBitcoin official repo has changed.

   4f73814175
3. 
   NicolasDorier commented at 6:25 AM on March 7, 2019: contributor

   ACK

4. luke-jr added the label Proposed BIP modification on Mar 7, 2019
5. luke-jr requested review from sipa on Mar 7, 2019
6. luke-jr assigned sipa on Mar 7, 2019
7. 
   luke-jr commented at 10:32 PM on September 19, 2019: member

   @sipa

8. 
   sipa commented at 10:57 PM on September 19, 2019: member

   ACK

9. luke-jr merged this on Nov 4, 2019
10. luke-jr closed this on Nov 4, 2019

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Review Requested
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