docs: update documentation improvement issue template

.github/ISSUE_TEMPLATE/documentation-improvement.md

@@ -0,0 +1,14 @@
+---
+name: Documentation improvement
+about: Suggest an improvement to the project documentation
+title: ''
+labels: documentation
+assignees: ''
+
+---
+
+**What area of the project documentation is missing, lacking or could be clearer?**
+Please write clearly and concisely to explain what problems you hit with the documentation
+
+**How could this documentation be improved? What would you like to see here?**
+Suggestions help guide documentation going forward into the future