Update ISSUE_TEMPLATE.md

ISSUE_TEMPLATE.md

-> If you'd like to request an icon, please provide the following information:
-> - icon name
-> - at least one use case
-> - screenshot of similar icon
->
-> Please create one issue for each icon request.
+If you'd like to request an icon, please provide the following information:
+- icon name
+- at least one use case
+- screenshots of similar icons
+
+Please create one issue for each icon request.
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