Update monitor.md

typo

Author: sirdeggen

docs/monitor.md

@@ -8,7 +8,7 @@ To function properly, a wallet must be able to perform a number of house keeping
 1. Obtain and merge proofs when transactions are mined.
 1. Detect and propagate transactions that fail due to double-spend, reorgs, or other reasons.
 
-These tasks are the responssibility of the [Monitor](#class-monitor) class.
+These tasks are the responsibility of the [Monitor](#class-monitor) class.
 
 [Return To Top](./README.md)
 
@@ -621,4 +621,4 @@ Links: [API](#api), [Interfaces](#interfaces), [Classes](#classes), [Functions](
 #### Variables
 
 
-<!--#endregion ts2md-api-merged-here-->
+<!--#endregion ts2md-api-merged-here-->