Fixed styling in feature request template.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -7,20 +7,22 @@ assignees: ''
 
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+### Describe the feature request
 Is your feature request related to a problem? Please describe.
 A clear and concise description of what the problem is. Example. I'm am trying to do [...] but [...]
 
-Which project is your feature request related to?
- Client
- ManagedClient
- MQTTnet.Server standalone
- Server
- Generic
-Describe the solution you'd like
+### Which project is your feature request related to?
+- [x] Client
+- [ ] ManagedClient
+- [ ] MQTTnet.Server standalone
+- [ ] Server
+- [ ] Generic
+
+### Describe the solution you'd like
 A clear and concise description of what you want to happen.
 
-Describe alternatives you've considered
+### Describe alternatives you've considered
 A clear and concise description of any alternative solutions or features you've considered.
 
-Additional context
+### Additional context
 Add any other context or screenshots about the feature request here.