Update bug_report.md

Help users understand when to contact support vs. when to submit issues in GitHub, and direct developers to the Discussion board for the SDK.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -6,11 +6,12 @@ labels: 'bug'
 assignees: ''
 
 ---
+This issue tracker is for bug reports only. **If you want to request troubleshooting assistance with Outline Manager or Outline Client, please do not submit a bug here. Instead, please contact us using our [support website](https://support.getoutline.org/s/contactsupport).** Developers, please post your questions on the [SDK Discussion board](https://github.com/Jigsaw-Code/outline-sdk/discussions).
 
 **Describe the bug**
 A clear and concise description of what the bug is.
 
-**To Reproduce**
+**To reproduce**
 How can the broken behavior be reproduced? 
 
 **Expected behavior**
@@ -19,11 +20,11 @@ What behavior did you expect?
 **Screenshots**
 If applicable, add screenshots to help explain your problem.
 
-**Client System (please complete the following information):**
+**Client system (please complete the following information):**
  - Outline Client Version [e.g. iOS 1.3.1]
  - Your Operating System: [e.g. iOS 14.2, Windows 10]
 
-**Submit Feedback**
+**Submit feedback**
 Please submit feedback through the app and label it with this issue number.
 
 **Additional context**