Typo : total_estimate instead of estimation

Author: benchti

readme.md

@@ -543,15 +543,15 @@ hoursPerDay: 8
 issueColumns:
 - iid
 - title
-- estimation
+- total_estimate
 
 # Include the given columns in the merge request table
 # See --merge_request_columns option for more information
 # defaults to iid, title, spent, total_estimate
 mergeRequestColumns:
 - iid
 - title
-- estimation
+- total_estimate
 
 # Include the given columns in the time record table
 # See --record_columns option for more information
@@ -789,4 +789,4 @@ or already have done so. 💜
 
 ## license
 
-GPL v2
+GPL v2