Bump dotenv-rails from 2.7.5 to 2.7.6 (#14405)

Bumps [dotenv-rails](https://github.com/bkeepers/dotenv) from 2.7.5 to 2.7.6.
- [Release notes](https://github.com/bkeepers/dotenv/releases)
- [Changelog](https://github.com/bkeepers/dotenv/blob/master/Changelog.md)
- [Commits](https://github.com/bkeepers/dotenv/compare/v2.7.5...v2.7.6)

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

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

Gemfile.lock

@@ -197,10 +197,10 @@ GEM
       unf (>= 0.0.5, < 1.0.0)
     doorkeeper (5.4.0)
       railties (>= 5)
-    dotenv (2.7.5)
-    dotenv-rails (2.7.5)
-      dotenv (= 2.7.5)
-      railties (>= 3.2, < 6.1)
+    dotenv (2.7.6)
+    dotenv-rails (2.7.6)
+      dotenv (= 2.7.6)
+      railties (>= 3.2)
     e2mmap (0.1.0)
     ed25519 (1.2.4)
     elasticsearch (7.8.0)