Update UPGRADE.md

Author: hirenbhut93

UPGRADE.md

@@ -8,7 +8,7 @@ if you want to upgrade from version A to version C and there is
 version B between A and C, you need to following the instructions
 for both A and B.
 
-Upgrade from 2.0.0 tp 2.0.1
+Upgrade from 2.0.0 to 2.0.1
 ---------------------------
 
 - Change namespace prefix `yii\multipleinput\` to `unclead\multipleinput\`.
@@ -40,4 +40,4 @@ After installing version 1.1.0 you have to rename js events following the next s
 
 - Event `init` rename to `afterInit` 
 - Event `addNewRow` rename to `afterAddRow`
-- Event `removeRow` rename to `afterDeleteRow` 
+- Event `removeRow` rename to `afterDeleteRow`