Update pull_request_template.md (#748)

Make the PR template more readable.

.github/pull_request_template.md

@@ -1,4 +1,4 @@
-<!-- README: DELETE THIS COMMENT BLOCK after:
+<!-- READ & DELETE:
     1. Add a descriptive title `[<Tag>] <DESCRIPTION>`
     2. Update _Assignee(s)_
     3. Add _Label(s)_
@@ -9,13 +9,13 @@
 
 ## Summary
 
-<!-- README: DELETE THIS COMMENT BLOCK after
-      - Providing a quick summary of the changes yourself
+<!-- READ & DELETE:
+    - Providing a quick summary of the changes yourself
 -->
 
 ## Issue
 
-<!-- README: DELETE THIS COMMENT BLOCK after:
+<!-- READ & DELETE:
      - Explain the reasoning for the PR in 1-2 sentences. Adding a screenshot is fair game.
      - If applicable: specify the ticket number below if there is a relevant issue; _keep the `-` so the full issue is referenced._
 -->
@@ -34,20 +34,21 @@ Select one or more:
 
 ## Testing
 
-**Documentation changes** (only if making doc changes)
-- [ ] `make docusaurus_start`; only needed if you make doc changes
+<!-- READ & DELETE:
+- Documentation changes: only keep this if you're making documentation changes
+- Unit Testing: Remove this if you didn't make code changes
+- E2E Testing: Remove this if you didn't make code changes
+    - See the quickstart guide for instructions: https://dev.poktroll.com/developer_guide/quickstart
+- DevNet E2E Testing: Remove this if you didn't make code changes
+    - THIS IS VERY EXPENSIVE: only do it after all the reviews are complete.
+    - Optionally run `make trigger_ci` if you want to re-trigger tests without any code changes
+    - If tests fail, try re-running failed tests only using the GitHub UI as shown [here](https://github.com/pokt-network/poktroll/assets/1892194/607984e9-0615-4569-9452-4c730190c1d2)
+-->
 
-**Local Testing** (only if making code changes)
+- [ ] **Documentation**: `make docusaurus_start`; only needed if you make doc changes
 - [ ] **Unit Tests**: `make go_develop_and_test`
 - [ ] **LocalNet E2E Tests**: `make test_e2e`
-- See [quickstart guide](https://dev.poktroll.com/developer_guide/quickstart) for instructions
-
-**PR Testing** (only if making code changes)
 - [ ] **DevNet E2E Tests**: Add the `devnet-test-e2e` label to the PR.
-    - **THIS IS VERY EXPENSIVE**, so only do it after all the reviews are complete.
-    - Optionally run `make trigger_ci` if you want to re-trigger tests without any code changes
-    - If tests fail, try re-running failed tests only using the GitHub UI as shown [here](https://github.com/pokt-network/poktroll/assets/1892194/607984e9-0615-4569-9452-4c730190c1d2)
-
 
 ## Sanity Checklist