update README

Author: penicillin0

README.md

@@ -1,6 +1,7 @@
-<img src="https://user-images.githubusercontent.com/56141035/142194448-ba244c30-3fdb-4e2e-9c59-0cd92fc55120.jpg" width=80%>
+<img src="https://user-images.githubusercontent.com/56141035/142559390-590b5c13-c3a9-4e7f-b4a0-980a322eb6af.jpg" width=75%>
 
 # <img src="public/images/icon.png" width=5%> Scrapbox List Marker 0.0.1
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 <b>Customize the scrapbox list marker.</b>
 
 This is a third party chrome extension for Scrapbox users.<br>