update template

Author: dccowan

.github/pull_request_template.md

@@ -28,7 +28,8 @@ Feel free to remove lines from this template that do not apply to you pull reque
 * [ ] For sections and subsections:
     * [ ] A header and short summary of what is being done
     * [ ] Links to API documentation added for all classes and functions that are used
-    * [ ] Newly introduced functionality is explained or links provided to relevant notebooks
+    * [ ] Newly introduced functionality is explained, or links are provided to relevant materials
+    * [ ] The approach taken when choosing hyperparameter values is explained. The use of ad hoc values without explanation is discouraged.
     * [ ] All figures are legible and rendered appropriately
     * [ ] Coding cells have been linted according to the [style guides](https://docs.simpeg.xyz/latest/content/getting_started/contributing/code-style.html).
 * [ ] Marked as ready for review (if this is was a draft PR), and converted to a pull request

notebooks/contributing/pull_request.md

@@ -18,7 +18,8 @@ The following is a useful checklist for determining whether the tutorial noteboo
 * **For sections and subsections:**
     * A header and short summary of what is being done
     * Links to API documentation added for all classes and functions that are used
-    * Newly introduced functionality is explained or links provided to relevant notebooks
+    * Newly introduced functionality is explained, or links are provided to relevant materials
+    * The approach taken when choosing hyperparameter values is explained. The use of ad hoc values without explanation is discouraged.
     * All figures are legible and rendered appropriately
     * Coding cells have been linted according to the [style guides](https://docs.simpeg.xyz/latest/content/getting_started/contributing/code-style.html).