Update feature_request.md

Signed-off-by: Jan Kowalleck <[email protected]>

.github/ISSUE_TEMPLATE/feature_request.md

@@ -7,14 +7,20 @@ assignees: ''
 
 ---
 
-**Is your feature request related to a problem? Please describe.**
+## Is your feature request related to a problem? Please describe.
 A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
 
-**Describe the solution you'd like**
+## 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.
+
+## Contribution 
+
+<!-- please choos eone by putting an `x` in the box `[ ]` -->
+- [ ] I am willing to provide an implementation
+- [ ] I will wait until somebody else implements it