README regen triggered by 2.8.18 release(s)

Author: github-actions[bot]

README.md

@@ -5,7 +5,7 @@
 -	[`3.2.10`, `s6-3.2.10`, `3.2`, `s6-3.2`](https://github.com/haproxytech/haproxy-docker-ubuntu/blob/main/3.2/Dockerfile)
 -	[`3.1.12`, `s6-3.1.12`, `3.1`, `s6-3.1`](https://github.com/haproxytech/haproxy-docker-ubuntu/blob/main/3.1/Dockerfile)
 -	[`3.0.14`, `s6-3.0.14`, `3.0`, `s6-3.0`](https://github.com/haproxytech/haproxy-docker-ubuntu/blob/main/3.0/Dockerfile)
--	[`2.8.17`, `s6-2.8.17`, `2.8`, `s6-2.8`](https://github.com/haproxytech/haproxy-docker-ubuntu/blob/main/2.8/Dockerfile)
+-	[`2.8.18`, `s6-2.8.18`, `2.8`, `s6-2.8`](https://github.com/haproxytech/haproxy-docker-ubuntu/blob/main/2.8/Dockerfile)
 -	[`2.6.23`, `s6-2.6.23`, `2.6`, `s6-2.6`](https://github.com/haproxytech/haproxy-docker-ubuntu/blob/main/2.6/Dockerfile)
 -	[`2.4.30`, `s6-2.4.30`, `2.4`, `s6-2.4`](https://github.com/haproxytech/haproxy-docker-ubuntu/blob/main/2.4/Dockerfile)