Bump markdownz from 8.0.6 to 8.0.7 (#531)

Bumps [markdownz](https://github.com/zooniverse/markdownz) from 8.0.6 to 8.0.7.
- [Release notes](https://github.com/zooniverse/markdownz/releases)
- [Changelog](https://github.com/zooniverse/markdownz/blob/master/CHANGELOG.md)
- [Commits](zooniverse/markdownz@v8.0.6...v8.0.7)

---
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

@@ -44,7 +44,7 @@
     "drag-reorderable": "~0.2.0",
     "grommet": "~1.13.0",
     "history": "~4.4.1",
-    "markdownz": "~8.0.6",
+    "markdownz": "~8.0.7",
     "panoptes-client": "~5.5.5",
     "prop-types": "~15.8.1",
     "react": "~16.14.0",