chore(deps): update traefik docker tag to v2.9.9

This MR contains the following updates:

Package	Update	Change
traefik	patch	v2.9.8 -> v2.9.9

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Release Notes

containous/traefik

v2.9.9

Compare Source

Bug fixes:

• [acme] Update go-acme/lego to v4.10.2 (#​9749 by ldez)
• [http3] Update quic-go to v0.33.0 (#​9737 by ldez)
• [metrics] Include user-defined default cert for traefik_tls_certs_not_after metric (#​9742 by rtribotte)
• [middleware] Update vulcand/oxy to a0e9f7f (#​9750 by ldez)
• [nomad] Fix default configuration settings for Nomad Provider (#​9758 by aofei)
• [nomad] Fix Nomad client TLS defaults (#​9795 by rtribotte)
• [server] Remove User-Agent header removal from ReverseProxy director func (#​9752 by rtribotte)

Documentation:

• [middleware] Clarify ratelimit middleware (#​9777 by mpl)
• [tcp] Correcting variable name 'server address' in TCP Router (#​9743 by ralphg6)

v2.9.9

Compare Source

Bug fixes:

• [acme] Update go-acme/lego to v4.10.2 (#​9749 by ldez)
• [http3] Update quic-go to v0.33.0 (#​9737 by ldez)
• [metrics] Include user-defined default cert for traefik_tls_certs_not_after metric (#​9742 by rtribotte)
• [middleware] Update vulcand/oxy to a0e9f7f (#​9750 by ldez)
• [nomad] Fix default configuration settings for Nomad Provider (#​9758 by aofei)
• [nomad] Fix Nomad client TLS defaults (#​9795 by rtribotte)
• [server] Remove User-Agent header removal from ReverseProxy director func (#​9752 by rtribotte)

Documentation:

• [middleware] Clarify ratelimit middleware (#​9777 by mpl)
• [tcp] Correcting variable name 'server address' in TCP Router (#​9743 by ralphg6)

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