added clone icon attribution note

sadakchap · sadakchap · commit 5d1b9ff45ce3 · 2021-07-27T07:20:43.000+05:30
diff --git a/src/icons/clone-icon-license.txt b/src/icons/clone-icon-license.txt
@@ -0,0 +1 @@
+"clone-icon.svg" by FontAwesome (fontawesome.com) is licensed under CC BY 4.0.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+"clone-icon.svg" by FontAwesome (fontawesome.com) is licensed under CC BY 4.0.`