chore(deps): update helm chart oauth2-proxy to v5

[renovate-self-hosted]

This PR contains the following updates:

Package	Update	Change
oauth2-proxy (source)	major	4.2.2 -> 5.0.0

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Release Notes

oauth2-proxy/oauth2-proxy

v5.0.0

Release Highlights

• Disabled CGO (binaries will work regardless og glibc/musl)
• Allow whitelisted redirect ports
• Nextcloud provider support added
• DigitalOcean provider support added

Important Notes

• (Security) Fix for open redirect vulnerability.. a bad actor using /\ in redirect URIs can redirect a session to another domain

Breaking Changes

• #​321 Add reverse proxy boolean flag to control whether headers like X-Real-Ip are accepted.
  This defaults to false. Usage behind a reverse proxy will require this flag to be set to avoid logging the reverse proxy IP address.

Changes since v4.1.0

• #​331 Add reverse proxy setting (@​martin-css)
• #​365 Build with CGO=0 (@​tomelliff)
• #​339 Add configuration for cookie 'SameSite' value. (@​pgroudas)
• #​347 Update keycloak provider configuration documentation. (@​sushiMix)
• #​325 dist.sh: use sha256sum (@​syscll)
• #​179 Add Nextcloud provider (@​Ramblurr)
• #​280 whitelisted redirect domains: add support for whitelisting specific ports or allowing wildcard ports (@​kamaln7)
• #​351 Add DigitalOcean Auth provider (@​kamaln7)

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