all: upgrade go directive to at least 1.24.0 [generated]

By now Go 1.25.0 has been released, and Go 1.23 is no longer supported
per the Go Release Policy (see https://go.dev/doc/devel/release#policy).

For golang/go#69095.

[git-generate]
(cd . && go get [email protected] && go mod tidy && go fix ./... && go mod edit -toolchain=none)

Change-Id: Ie6fedd5297c75b967da47077bb6ab7eac229939f
Reviewed-on: https://go-review.googlesource.com/c/website/+/695359
Reviewed-by: Dmitri Shuralyov <[email protected]>
Auto-Submit: Gopher Robot <[email protected]>
Reviewed-by: David Chase <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>

Author: gopherbot

go.mod

@@ -1,6 +1,6 @@
 module golang.org/x/website
 
-go 1.23.0
+go 1.24.0
 
 require (
 	cloud.google.com/go/cloudbuild v1.14.0