chore(deps): update traefik docker tag to v3.1.1 #590

Job	Run time
Build Sablier docker image once and share it to E2E jobs	1m 30s
Build Caddy docker image once and share it to Caddy E2E jobs	1m 19s
Build ProxyWasm Plugin once and share it to ProxyWasm E2E jobs	42s
Build Caddy Sablier Plugin	23s
Build Traefik Sablier Plugin	12s
Run Sablier E2E tests for Proxywasm middleware on Apache APISIX (docker)	1m 37s
Run Sablier E2E tests for Caddy middleware (docker)	1m 41s
Run Sablier E2E tests for Caddy middleware (docker_swarm)	2m 45s
Run Sablier E2E tests for Proxywasm middleware on Envoy (docker)	1m 31s
Run Sablier E2E tests for Proxywasm middleware on Nginx (docker)	1m 54s
Run Sablier E2E tests for Nginx NJS module with Sablier (docker)	1m 53s
Run Sablier E2E tests for Nginx NJS module with Sablier (docker_swarm)	2m 59s
Run Sablier E2E tests for Traefik middleware (docker)	1m 26s
Run Sablier E2E tests for Traefik middleware (docker_swarm)	2m 48s
Run Sablier E2E tests for Traefik middleware (kubernetes)	1m 54s
	24m 34s

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