add another item to checklist

.github/PULL_REQUEST_TEMPLATE/docs-update-pr.md

@@ -22,3 +22,4 @@ Please refer to the [docs style guide](https://github.com/AlexsLemonade/OpenScPC
 - [ ] Do the docs adhere to the style guide [**structure directions**](https://github.com/AlexsLemonade/OpenScPCA-analysis/blob/main/docs/general-style-guide.md#structure)?
 - [ ] Do the docs adhere to the style guide [**language directions**](https://github.com/AlexsLemonade/OpenScPCA-analysis/blob/main/docs/general-style-guide.md#structure)?
 - [ ] Do the docs adhere to the style guide [**tone directions**](https://github.com/AlexsLemonade/OpenScPCA-analysis/blob/main/docs/general-style-guide.md#tone)?
+- [ ] Has the docs page been added to the `nav` section in `mkdocs.yml`?