meta: update pull request template (#2702)

Author: dingsdax

.github/pull_request_template.md

@@ -2,16 +2,21 @@ Thanks for your Pull Request 🎉
 
 **Please keep these instructions in mind so we can review it more efficiently:**
 
-- Add the references of all the related issues/PRs in the description
+- Add the references of all the related GH issues, Linear IDs or PRs in the description
 - Whether it's a new feature or a bug fix, make sure they're covered by new test cases
 - If this PR contains any refactoring work, please give it its own commit(s)
 - Finally, please add an entry to the corresponding changelog
-
+- PR title should use [conventional commit](https://develop.sentry.dev/engineering-practices/commit-messages/#type) style (`feat:`, `fix:`, `ref:`, `meta:`)
 
 **Other Notes**
 - We squash all commits before merging
-- We generally review new PRs within a week
-- If you have any question, you can ask for feedback in our [discord community](https://discord.gg/Ww9hbqr) first
+- We generally try to review new PRs within a week
+- If you have any question, you can ask for feedback in our [discord community](https://discord.gg/Ww9hbqr) first or consult [CONTRIBUTING.md](../CONTRIBUTING.md) or [Sentry SDK development docs](https://develop.sentry.dev/sdk/)
 
 ## Description
 Describe your changes:
+
+<!--
+* resolves: #1234
+* resolves: LIN-1234
+-->