Fix readme config

Change config line to match what is checked here: https://github.com/gitconsensus/GitConsensusCLI/blob/master/gitconsensus/repository.py#L383

Author: Evanito

README.md

@@ -56,7 +56,7 @@ licensedelay: 72
 consensusdelay: 72
 
 # Do not allow license changes to be merged.
-lockconsensus: true
+locklicense: true
 
 # Do not allow consensus changes to be merged.
 lockconsensus: true