Added credits for icon

stefanoborini · stefanoborini · commit 934027a3c672 · 2019-07-18T21:45:12.000+01:00
diff --git a/icons/README.md b/icons/README.md
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+<div>Icon made from <a href="http://www.onlinewebfonts.com/icon">Icon Fonts</a> is licensed by CC BY 3.0</div>

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	`1`	`+<div>Icon made from <a href="http://www.onlinewebfonts.com/icon">Icon Fonts</a> is licensed by CC BY 3.0</div>`