chore: create documentation improvement issue template (#57)

.github/ISSUE_TEMPLATE/documentation-improvement.md

@@ -0,0 +1,30 @@
+---
+name: Documentation improvement
+about: Create a report to help us improve the documentation
+title: Documentation improvement
+labels: documentation
+assignees: ahurli, BainanXia, danielolsen, jon-hagg, rouille
+
+---
+
+# :book:
+
+### Problem
+Tell us about the confusion introduced in the documentation:
+* **Ambiguous**
+"[...] made me think that [...] when really it should be [...]"
+"I found [...] to be unclear because [...]"
+* **Missing**
+"There is no example showing how to do [...]"
+* **Wrong**
+"The Installation Guide says to run `[...]` when it should be `[...]`"
+* **Outdated**
+"The function `foo` used in the code snippet has been renamed to `bar`"
+
+If you are referencing an existing piece of documentation or example please provide a link.
+
+### Suggested Improvement
+If you have an idea to improve the documentation please suggest it here
+* "This line should be be changed to say [...]"
+* "Include a paragraph explaining [...]"
+* "Add a figure showing [...]"