chore: make PR template checklist easier to edit (#7753)

Author: kuhe

.github/pull_request_template.md

@@ -7,13 +7,15 @@ What does this implement/fix? Explain your changes.
 ### Testing
 How was this change tested?
 
-### Additional context
-Add any other context about the PR here.
-
 ### Checklist
-- [ ] If the PR is a feature, add integration tests (`*.integ.spec.ts`).
-- [ ] If you wrote E2E tests, are they resilient to concurrent I/O?
-- [ ] If adding new public functions, did you add the `@public` tag and enable doc generation on the package?
+- [ ] If the PR is a feature, add integration tests (`*.integ.spec.ts`) or E2E tests.
+  - [ ] It's not a feature.
+- [ ] My E2E tests are resilient to concurrent i/o.
+  - [ ] I didn't write any E2E tests.
+- [ ] I added access level annotations e.g. `@public`, `@internal` tags and enabled doc generation on the package. Remember that access level annotations go below the description, not above.
+  - [ ] I didn't add any public functions.
+- [ ] Streams - how do they work?? My WebStream readers/locks are properly lifecycled. Node.js stream backpressure is handled. Error handling.
+  - [ ] No streams here.
 
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