chore(docs-pr-template): update PR submission steps (#266)

Author: erezrokah

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,24 @@
+🎉 Thanks for submitting a pull request! 🎉
+
+#### Summary
+
+Fixes #<replace_with_issue_number>
+
+<!--
+Explain the **motivation** for making this change. What existing problem does the pull request solve and how?
+-->
+
+---
+
+For us to review and ship your PR efficiently, please perform the following steps:
+
+- [ ] Open a [bug/issue](https://github.com/netlify/build-plugin-template/issues/new/choose) before writing your code 🧑‍💻. This
+      ensures we can discuss the changes and get feedback from everyone that should be involved. If you\`re fixing a
+      typo or something that\`s on fire 🔥 (e.g. incident related), you can skip this step.
+- [ ] Read the [contribution guidelines](../CONTRIBUTING.md) 📖. This ensures your code follows our style guide and
+      passes our tests.
+- [ ] Update or add tests (if any source code was changed or added) 🧪
+- [ ] Update or add documentation (if features were changed or added) 📝
+- [ ] Make sure the status checks below are successful ✅
+
+**A picture of a cute animal (not mandatory, but encouraged)**