Update README

Author: zmarty

README

@@ -11,7 +11,7 @@ Instruction:
 1. Paste the file "NPPJSONViewer.dll" to Notepad++ plugin folder
 2. open a document containing a JSON string
 3. Select JSON fragment and navigate to plugins/JSON Viewer/show JSON Viewer or press "Ctrl+Alt+Shift+J"
-4. Viola!! if the JSON is valid, it will be shown in a Treeview
+4. Voila!! if the JSON is valid, it will be shown in a Treeview
 
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