Bump dotenv-rails from 2.7.6 to 3.1.0

Bumps [dotenv-rails](https://github.com/bkeepers/dotenv) from 2.7.6 to 3.1.0.
- [Release notes](https://github.com/bkeepers/dotenv/releases)
- [Changelog](https://github.com/bkeepers/dotenv/blob/main/Changelog.md)
- [Commits](bkeepers/dotenv@v2.7.6...v3.1.0)

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

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

Gemfile.lock

@@ -168,10 +168,10 @@ GEM
       warden (~> 1.2.3)
     diff-lcs (1.5.0)
     domain_name (0.6.20240107)
-    dotenv (2.7.6)
-    dotenv-rails (2.7.6)
-      dotenv (= 2.7.6)
-      railties (>= 3.2)
+    dotenv (3.1.0)
+    dotenv-rails (3.1.0)
+      dotenv (= 3.1.0)
+      railties (>= 6.1)
     drb (2.2.1)
     e2mmap (0.1.0)
     erb_lint (0.5.0)