chore(deps-dev): bump dotenv from 2.7.6 to 2.8.1

Bumps [dotenv](https://github.com/bkeepers/dotenv) from 2.7.6 to 2.8.1.
- [Release notes](https://github.com/bkeepers/dotenv/releases)
- [Changelog](https://github.com/bkeepers/dotenv/blob/main/Changelog.md)
- [Commits](bkeepers/dotenv@v2.7.6...v2.8.1)

---
updated-dependencies:
- dependency-name: dotenv
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -19,7 +19,7 @@ GEM
     colorize (0.8.1)
     concurrent-ruby (1.3.5)
     diff-lcs (1.4.4)
-    dotenv (2.7.6)
+    dotenv (2.8.1)
     dry-configurable (0.15.0)
       concurrent-ruby (~> 1.0)
       dry-core (~> 0.6)