Bump omniauth from 2.0.3 to 2.0.4 (#13312)

Bumps [omniauth](https://github.com/omniauth/omniauth) from 2.0.3 to 2.0.4.
- [Release notes](https://github.com/omniauth/omniauth/releases)
- [Commits](https://github.com/omniauth/omniauth/compare/v2.0.3...v2.0.4)

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

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

Gemfile.lock

@@ -482,7 +482,7 @@ GEM
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
     oj (3.11.3)
-    omniauth (2.0.3)
+    omniauth (2.0.4)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
       rack-protection