Bug fixes:

• [kv] Upgrade valkeyrie to v0.4.1 (#9161 by moutoum)
• [middleware,metrics] Improve performances when Prometheus metrics are enabled (#9168 by juliens)
• [middleware] Support forwarded websocket protocol in RedirectScheme (#9159 by moutoum)

Documentation:

• Update the language for advocating page (#9169 by tfny)
• Add callout for anyone using Traefik to manage commercial applications (#9152 by tomatokoolaid)
• Update deprecation notices (#9149 by ddtmachado)