Updated pull request rtemplate

.github/PULL_REQUEST_TEMPLATE.md

-* Follow the contribution guidelines in [`CONTRIBUTING.md`](https://github.com/grafana/grafana/blob/master/CONTRIBUTING.md)
-* Rebase your PR if it gets out of sync with master
-* Include `closes #<issue>` or a link to the issue in the description
+<!--  Thanks for sending a pull request!  Here are some tips for you:
 
-**REMOVE THE TEXT ABOVE BEFORE CREATING THE PULL REQUEST**
+1. If this is your first time, please read our [`CONTRIBUTING.md`](https://github.com/grafana/grafana/blob/master/CONTRIBUTING.md) guide.
+2. Ensure you have added or ran the appropriate tests for your PR.
+3. If it's a new feature or config option it will need a docs update. Docs are under the docs folder in repo root.
+6. If the PR is unfinished, mark it as a draft PR.
+-->
+
+**What this PR does / why we need it**:
+
+**Which issue(s) this PR fixes**:
+<!--
+*Automatically closes linked issue when PR is merged.
+Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`.
+-->
+Fixes #
+
+**Special notes for your reviewer**:
+
+**Release note**:
+<!--
+If this is a user facing change and should be mentioned in relase note add it below. If no, just write "NONE" below.
+-->
+```release-note
+
+```