Fix: integration tests in CI.

[dblock]

 1) omniauth works
     Failure/Error: get '/'

     ArgumentError:
       invalid secret: 24, must be >=64
     # ./spec/integration/omniauth/integration_spec.rb:34:in `block (2 levels) in <top (required)>'
     # ./spec/integration/omniauth/integration_spec.rb:25:in `block (2 levels) in <top (required)>'

https://github.com/hashie/hashie/actions/runs/8597426729/job/23574774172

Rails secret min length has changed in a minor version?

[dangerpr-bot]

	1 Warning
⚠️	Unless you're refactoring existing code or improving documentation, please update CHANGELOG.md.

Here's an example of a CHANGELOG.md entry:

* [#581](https://github.com/hashie/hashie/pull/581): Fix: integration tests in ci - [@dblock](https://github.com/dblock).

Generated by 🚫 Danger