Converted list of issue types to a task list

.github/ISSUE_TEMPLATE.md

@@ -13,9 +13,9 @@
     will be closed.
 --->
 ### Issue type
-[ ] Feature request <!-- Requesting the implementation of a new feature -->
-[ ] Bug report      <!-- Reporting unexpected or erroneous behavior -->
-[ ] Documentation   <!-- Proposing a modification to the documentation -->
+- [ ] Feature request <!-- Requesting the implementation of a new feature -->
+- [ ] Bug report      <!-- Reporting unexpected or erroneous behavior -->
+- [ ] Documentation   <!-- Proposing a modification to the documentation -->
 
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     Please describe the environment in which you are running NetBox. (Be sure