Update plugin folder to plugins\NPPJSONViewer

Author: tiborepcek

README

@@ -8,7 +8,7 @@ This plugin is meant to display a JSON string in a Treeview. It also marks the e
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 Instruction:
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-1. Paste the file "NPPJSONViewer.dll" to Notepad++ plugin folder
+1. Paste the file "NPPJSONViewer.dll" to Notepad++ plugins\NPPJSONViewer 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. Voila!! if the JSON is valid, it will be shown in a Treeview