chore(deps): bump wagtail-color-panel from 1.6.0 to 1.8.1

Bumps [wagtail-color-panel](https://github.com/marteinn/wagtail-color-panel) from 1.6.0 to 1.8.1.
- [Release notes](https://github.com/marteinn/wagtail-color-panel/releases)
- [Changelog](https://github.com/marteinn/wagtail-color-panel/blob/main/CHANGELOG.md)
- [Commits](marteinn/wagtail-color-panel@v1.6.0...v1.8.1)

---
updated-dependencies:
- dependency-name: wagtail-color-panel
  dependency-version: 1.8.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -284,7 +284,7 @@ wagtail==7.2.3
     #   wagtailmedia
 wagtail-ab-testing==0.12
     # via -r requirements.in
-wagtail-color-panel==1.6.0
+wagtail-color-panel==1.8.1
     # via -r requirements.in
 wagtail-factories==4.2.1
     # via -r requirements.in