Update pull request template with more details (#29273)

* Update pull request template with more details

* Update .github/pull_request_template.md

Co-authored-by: Brennan <[email protected]>

* Update pull_request_template.md

Co-authored-by: Brennan <[email protected]>

.github/pull_request_template.md

@@ -1,5 +1,21 @@
+
+<!-- Thank you for submitting a pull request to our repo. -->
+
+<!-- If this is your first PR in the ASP.NET Core repo, please run through the checklist 
+below to ensure a smooth review and merge process for your PR. -->
+
+- [ ] You've read the [Contributor Guide](https://github.com/dotnet/aspnetcore/blob/master/CONTRIBUTING.md) and [Code of Conduct](https://github.com/dotnet/aspnetcore/blob/master/CODE-OF-CONDUCT.md).
+- [ ] You've included unit or integration tests for your change, where applicable.
+- [ ] You've included inline docs for your change, where applicable.
+- [ ] There's an open issue for the PR that you are making. If you'd like to propose a new feature or change, please open an issue to discuss the change or find an existing issue.
+
+<!-- Once all that is done, you're ready to go. Open the PR with the content below. -->
+
+**PR Title**
 Summary of the changes (Less than 80 chars)
- - Detail 1
- - Detail 2
+
+**PR Description**
+Detail 1
+Detail 2
 
 Addresses #bugnumber (in this specific format)