Bump markdownz from 9.1.5 to 9.1.6 (#6971)

Bumps [markdownz](https://github.com/zooniverse/markdownz) from 9.1.5 to 9.1.6.
- [Release notes](https://github.com/zooniverse/markdownz/releases)
- [Changelog](https://github.com/zooniverse/markdownz/blob/main/CHANGELOG.md)
- [Commits](zooniverse/markdownz@v9.1.5...v9.1.6)

---
updated-dependencies:
- dependency-name: markdownz
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -15,7 +15,7 @@
     "hash.js": "~1.1.7",
     "history": "~3.3.0",
     "lodash": "~4.17.11",
-    "markdownz": "~9.1.5",
+    "markdownz": "~9.1.6",
     "modal-form": "~2.9",
     "moment": "~2.29.0",
     "panoptes-client": "~5.6.0",