Bump dotenv-rails from 3.0.2 to 3.1.2

Bumps [dotenv-rails](https://github.com/bkeepers/dotenv) from 3.0.2 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@v3.0.2...v3.1.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -241,9 +241,9 @@ GEM
       activerecord (>= 4.2, < 8)
     docile (1.4.0)
     domain_name (0.6.20240107)
-    dotenv (3.0.2)
-    dotenv-rails (3.0.2)
-      dotenv (= 3.0.2)
+    dotenv (3.1.2)
+    dotenv-rails (3.1.2)
+      dotenv (= 3.1.2)
       railties (>= 6.1)
     drb (2.2.1)
     dry-initializer (3.1.1)