Add missing Ingress namespace field

[IronMage]

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Description

Selenium Grid chart does not include the release namespace in the object definition, causing it to be deployed to the default namespace rather than the target namespace.

Motivation and Context

Deploying with the helm --namespace flag causes the ingress to potentially be deployed to a different namespace.

Types of changes

• [ x] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[diemol]

Thank you, @IronMage!

[IronMage]

@diemol Will you be re-packaging selenium-grid-0.21.3? I can also put in a PR to bump the version to 0.21.4 instead.

[diemol]

Sorry, I missed this. I already released it.