Bump dotenv-rails from 2.2.1 to 2.5.0

Bumps [dotenv-rails](https://github.com/bkeepers/dotenv) from 2.2.1 to 2.5.0.
- [Release notes](https://github.com/bkeepers/dotenv/releases)
- [Changelog](https://github.com/bkeepers/dotenv/blob/master/Changelog.md)
- [Commits](bkeepers/dotenv@v2.2.1...v2.5.0)

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

Gemfile.lock

@@ -69,10 +69,10 @@ GEM
       devise (> 3.5.2, <= 4.3)
       rails (< 6)
     diff-lcs (1.3)
-    dotenv (2.2.1)
-    dotenv-rails (2.2.1)
-      dotenv (= 2.2.1)
-      railties (>= 3.2, < 5.2)
+    dotenv (2.5.0)
+    dotenv-rails (2.5.0)
+      dotenv (= 2.5.0)
+      railties (>= 3.2, < 6.0)
     erubi (1.7.1)
     factory_bot (4.8.2)
       activesupport (>= 3.0.0)