Bump dotenv-rails from 3.1.4 to 3.1.6

Bumps [dotenv-rails](https://github.com/bkeepers/dotenv) from 3.1.4 to 3.1.6.
- [Release notes](https://github.com/bkeepers/dotenv/releases)
- [Changelog](https://github.com/bkeepers/dotenv/blob/main/Changelog.md)
- [Commits](bkeepers/dotenv@v3.1.4...v3.1.6)

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

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

Gemfile.lock

@@ -270,9 +270,9 @@ GEM
     doorkeeper-openid_connect (1.8.10)
       doorkeeper (>= 5.5, < 5.9)
       jwt (>= 2.5)
-    dotenv (3.1.4)
-    dotenv-rails (3.1.4)
-      dotenv (= 3.1.4)
+    dotenv (3.1.6)
+    dotenv-rails (3.1.6)
+      dotenv (= 3.1.6)
       railties (>= 6.1)
     drb (2.2.1)
     dry-auto_inject (1.0.1)