fix: Remove Derek and Karla as default assignees for docs issues (#2129)

## Description:
Derek and Karla are the default assignees for docs issues; this fixes
that

## Is this change user facing?
NO

.github/ISSUE_TEMPLATE/docs-issue.yml

@@ -1,9 +1,7 @@
 name: "Docs Issue"
 description: Report an issue in our documentation
 labels: ["docs"]
-assignees:
- - leeederek
- - thylocine33
+assignees: []
 body:
  - type: input
  id: url-link