chore(deps): update helm release oauth2-proxy to v6.21.0

This MR contains the following updates:

Package	Update	Change
oauth2-proxy (source)	minor	6.20.1 -> 6.21.0

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Release Notes

oauth2-proxy/manifests (oauth2-proxy)

v6.21.0

Compare Source

A reverse proxy that provides authentication with Google, Github or other providers

What's Changed

• feat: Add possibility to set resources for the wait-for-redis initContainer by @​Farfaday in https://github.com/oauth2-proxy/manifests/pull/176

Full Changelog: https://github.com/oauth2-proxy/manifests/compare/oauth2-proxy-6.20.1...oauth2-proxy-6.21.0

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