Update traefik Docker tag to v3.1.6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
traefik	final	patch	v3.1.5 -> v3.1.6

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Release Notes

containous/traefik (traefik)

v3.1.6

Compare Source

Bug fixes:

• [middleware] Reuse compression writers (#​11168 by michelheusschen)
• [middleware] Use correct default weight in Accept-Encoding (#​11084 by michelheusschen)
• [plugins] Close wasm middleware to prevent memory leak (#​11151 by ttys3)

Misc:

• Merge branch v2.11 into v3.1 (#​11179 by kevinpollet)
• Merge branch v2.11 into v3.1 (#​11174 by mmatur)

v3.1.6

Compare Source

Bug fixes:

• [middleware] Reuse compression writers (#​11168 by michelheusschen)
• [middleware] Use correct default weight in Accept-Encoding (#​11084 by michelheusschen)
• [plugins] Close wasm middleware to prevent memory leak (#​11151 by ttys3)

Misc:

• Merge branch v2.11 into v3.1 (#​11179 by kevinpollet)
• Merge branch v2.11 into v3.1 (#​11174 by mmatur)

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