infra: PR template nits (#17752)

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,19 +1,24 @@
 Thank you for contributing to LangChain!
 
-Checklist:
-
-- [ ] PR title: Please title your PR "package: description", where "package" is whichever of langchain, community, core, experimental, etc. is being modified. Use "docs: ..." for purely docs changes, "templates: ..." for template changes, "infra: ..." for CI changes.
+- [ ] **PR title**: "package: description"
+  - Where "package" is whichever of langchain, community, core, experimental, etc. is being modified. Use "docs: ..." for purely docs changes, "templates: ..." for template changes, "infra: ..." for CI changes.
   - Example: "community: add foobar LLM"
-- [ ] PR message: **Delete this entire template message** and replace it with the following bulleted list
+
+
+- [ ] **PR message**: ***Delete this entire checklist*** and replace with
     - **Description:** a description of the change
     - **Issue:** the issue # it fixes, if applicable
     - **Dependencies:** any dependencies required for this change
     - **Twitter handle:** if your PR gets announced, and you'd like a mention, we'll gladly shout you out!
-- [ ] Pass lint and test: Run `make format`, `make lint` and `make test` from the root of the package(s) you've modified to check that you're passing lint and testing. See contribution guidelines for more information on how to write/run tests, lint, etc: https://python.langchain.com/docs/contributing/
-- [ ] Add tests and docs: If you're adding a new integration, please include
+
+
+- [ ] **Add tests and docs**: If you're adding a new integration, please include
   1. a test for the integration, preferably unit tests that do not rely on network access,
   2. an example notebook showing its use. It lives in `docs/docs/integrations` directory.
 
+
+- [ ] **Lint and test**: Run `make format`, `make lint` and `make test` from the root of the package(s) you've modified. See contribution guidelines for more: https://python.langchain.com/docs/contributing/
+
 Additional guidelines:
 - Make sure optional dependencies are imported within a function.
 - Please do not add dependencies to pyproject.toml files (even optional ones) unless they are required for unit tests.