Clarify label usage in bug reports

New labels have been added to better sort and categorize bug reports, 
so it was necessary to update the bug report issue template with 
information on what labels to apply.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,12 +1,16 @@
 ---
 name: Bug report
 about: Report any bugs or issues found
-title: "[Environment] [Issue location] Issue description"
-labels: bug
+title: "[Issue location] Issue description"
+labels: bug, windows
 assignees: ''
 
 ---
 
+**DELETE THIS**
+Make sure to appropriately label the issue using the **Labels** provided. Add any of the red labels to categorize the type of issue being reported, and any of the light green labels to specify which platforms the issue is relevant to.
+**DELETE THIS**
+
 **Environment (please complete the following information):**
  - Device: [e.g. PC; iPhone6]
  - OS: [e.g. Windows 10; iOS 11]