cicd: remove form input redundantly asking if the issue creator is interested in creating a PR

Author: 56kyle

.github/ISSUE_TEMPLATE/03_documentation.yml

@@ -50,12 +50,3 @@ body:
         What changes would make this clearer or more helpful?
     validations:
       required: false
-
-  - type: checkboxes
-    id: contribution
-    attributes:
-      label: Contribution
-      description: Are you willing to help improve this documentation?
-      options:
-        - label: I am willing to submit a PR to fix this documentation
-          required: false