image/iptables: update the base image

avagin · gvisor-bot · commit 1092006d459d · 2024-12-06T10:37:10.000-08:00
ubuntu:mantic isn't LTS and it reached its eol,
so new images can't be built.
PiperOrigin-RevId: 703543488
diff --git a/images/iptables/Dockerfile b/images/iptables/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:mantic
+FROM ubuntu:24.04
 
 # The iptables package installs both iptables-legacy and iptables-nft, with
 # iptables symlinked to the latter.

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-FROM ubuntu:mantic`
	`1`	`+FROM ubuntu:24.04`
`2`	`2`
`3`	`3`	`# The iptables package installs both iptables-legacy and iptables-nft, with`
`4`	`4`	`# iptables symlinked to the latter.`