Create docs_pull_request_template.md

Author: egil

.github/PULL_REQUEST_TEMPLATE/docs_pull_request_template.md

@@ -0,0 +1,16 @@
+---
+name: Documentation pull request
+about: 'Use this template for all changes to the live documentation at bunit.egilhansen.com.'
+assignees: 
+---
+
+## ## Summary of changes
+
+<!--- 
+    Provide a short description of the changes, _if_ necessary.
+-->
+
+### PR meta checklist
+- [ ] Pull request is targeting the `main` branch.
+- [ ] Pull request is linked to all related issues, if any.
+- [ ] I have read relevant parts of the _CONTRIBUTING.md_ document and _docs/README.md_.