Bump dotenv from 3.1.7 to 3.1.8

Bumps [dotenv](https://github.com/bkeepers/dotenv) from 3.1.7 to 3.1.8.
- [Release notes](https://github.com/bkeepers/dotenv/releases)
- [Changelog](https://github.com/bkeepers/dotenv/blob/main/Changelog.md)
- [Commits](bkeepers/dotenv@v3.1.7...v3.1.8)

---
updated-dependencies:
- dependency-name: dotenv
  dependency-version: 3.1.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -1573,7 +1573,7 @@ GEM
     docker-api (2.4.0)
       excon (>= 0.64.0)
       multi_json
-    dotenv (3.1.7)
+    dotenv (3.1.8)
     down (5.4.2)
       addressable (~> 2.8)
     drb (2.2.1)