add form option for citation

Author: jeffjennings

.github/ISSUE_TEMPLATE/new-tutorial.yml

@@ -41,6 +41,14 @@ body:
       description: If you are submitting a set of thematically linked tutorials, please provide a paragraph summarizing all of the notebooks, making clear their sequential order.
     validations:
       required: false
+  - type: checkboxes
+    id: check-citation
+    attributes:
+      label: Citation
+      description: Check here if you would like the tutorial to be made citable via an upload to [Zenodo](https://zenodo.org/). (If so, be sure to include the authors' ORCID IDs above.)
+      options:
+        - label: Yes, I would like the tutorial to be made citable via Zenodo.
+          required: false
   - type: checkboxes
     id: check-intro
     attributes: