build(deps-dev): bump dotenv-rails from 2.8.1 to 3.1.2 (#5713)

Bumps [dotenv-rails](https://github.com/bkeepers/dotenv) from 2.8.1 to 3.1.2.
- [Release notes](https://github.com/bkeepers/dotenv/releases)
- [Changelog](https://github.com/bkeepers/dotenv/blob/main/Changelog.md)
- [Commits](bkeepers/dotenv@v2.8.1...v3.1.2)

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

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

Gemfile.lock

@@ -177,10 +177,10 @@ GEM
     docx (0.8.0)
       nokogiri (~> 1.13, >= 1.13.0)
       rubyzip (~> 2.0)
-    dotenv (2.8.1)
-    dotenv-rails (2.8.1)
-      dotenv (= 2.8.1)
-      railties (>= 3.2)
+    dotenv (3.1.2)
+    dotenv-rails (3.1.2)
+      dotenv (= 3.1.2)
+      railties (>= 6.1)
     draper (4.0.2)
       actionpack (>= 5.0)
       activemodel (>= 5.0)