Update traefik Docker tag to v3.6.9

[renovate]

This PR contains the following updates:

Package	Update	Change
traefik	patch	v3.6.8 → v3.6.9

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Release Notes

containous/traefik (traefik)

v3.6.9

Compare Source

Bug fixes:

• [acme] Bump github.com/go-acme/lego/v4 to v4.32.0 (#​12702 by ldez)
• [middleware] Fix case sensitivity on x-forwarded headers for Connection (#​12690 by LBF38)
• [middleware, authentication] Handle empty/missing User-Agent header (#​12545 by a-stangl)
• [middleware, authentication] Add maxResponseBodySize configuration to forwardAuth middleware (#​12694 by gndz07)
• [server] Fix TLS handshake error handling (#​12692 by juliens)

Documentation:

• [docker] Update docker in-depth setup guide (#​12682 by mdevino)
• [k8s] Make labelSelector option casing more consistent (#​12658 by holysoles)
• [k8s/ingress-nginx] Add temporary note to advertise the incoming NGINX annotations (#​12699 by nmengin)
• Increased content width in documentation (#​12632 by tobiasge)
• Correct encoded characters allowance in entrypoints.md (#​12679 by Apflkuacha)

v3.6.9

Compare Source

Bug fixes:

• [acme] Bump github.com/go-acme/lego/v4 to v4.32.0 (#​12702 by ldez)
• [middleware] Fix case sensitivity on x-forwarded headers for Connection (#​12690 by LBF38)
• [middleware, authentication] Handle empty/missing User-Agent header (#​12545 by a-stangl)
• [middleware, authentication] Add maxResponseBodySize configuration to forwardAuth middleware (#​12694 by gndz07)
• [server] Fix TLS handshake error handling (#​12692 by juliens)

Documentation:

• [docker] Update docker in-depth setup guide (#​12682 by mdevino)
• [k8s] Make labelSelector option casing more consistent (#​12658 by holysoles)
• [k8s/ingress-nginx] Add temporary note to advertise the incoming NGINX annotations (#​12699 by nmengin)
• Increased content width in documentation (#​12632 by tobiasge)
• Correct encoded characters allowance in entrypoints.md (#​12679 by Apflkuacha)

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