Fix typo in MIP121.md

MIP121/MIP121.md

@@ -33,7 +33,7 @@ This MIP proposes to increase the GSM Pause Delay parameter from 48 hours to 72
 ## Component Summary
 
 **MIP121c1: Update via Executive Vote**
-This component describes how the Pause Delay will be manualy updated from 48 hours to 72 hours via an executive vote.
+This component describes how the Pause Delay will be manually updated from 48 hours to 72 hours via an executive vote.
 
 ## Motivation