Update to Go 1.24.3, set minimum to 1.23.9 (#6876)

Signed-off-by: Neil Twigg <neil@nats.io>

Author: neilalexander

.goreleaser.yml

@@ -21,7 +21,7 @@ builds:
     env:
       # This is the toolchain version we use for releases. To override, set the env var, e.g.:
       # GORELEASER_TOOLCHAIN="go1.22.8" TARGET='linux_amd64' goreleaser build --snapshot --clean --single-target
-      - GOTOOLCHAIN={{ envOrDefault "GORELEASER_TOOLCHAIN" "go1.24.2" }}
+      - GOTOOLCHAIN={{ envOrDefault "GORELEASER_TOOLCHAIN" "go1.24.3" }}
       - GO111MODULE=on
       - CGO_ENABLED=0
     goos:

.travis.yml

@@ -2,7 +2,7 @@ module github.com/nats-io/nats-server/v2
 
 go 1.23.0
 
-toolchain go1.23.7
+toolchain go1.23.9
 
 require (
 	github.com/antithesishq/antithesis-sdk-go v0.4.3-default-no-op