🌱 Bump Go version to 1.25.9 (cherry-pick of #3106)

Agent-Logs-Url: https://github.com/kubernetes-sigs/cluster-api-provider-openstack/sessions/d3b1a8bd-0427-4f87-b61f-7453b3738f46

Co-authored-by: lentzi90 <9117693+lentzi90@users.noreply.github.com>

Author: Copilot

Dockerfile

@@ -14,7 +14,7 @@
 
 # Build the manager binary
 ARG GO_VERSION
-FROM golang:${GO_VERSION:-1.25.8} AS builder
+FROM golang:${GO_VERSION:-1.25.9} AS builder
 WORKDIR /workspace
 
 # Run this with docker build --build_arg goproxy=$(go env GOPROXY) to override the goproxy

Makefile

@@ -27,7 +27,7 @@ unexport GOPATH
 TRACE ?= 0
 
 # Go
-GO_VERSION ?= 1.25.8
+GO_VERSION ?= 1.25.9
 
 # Ensure correct toolchain is used
 GOTOOLCHAIN = go$(GO_VERSION)

netlify.toml

@@ -4,7 +4,7 @@ command = "make -C docs/book build"
 publish = "docs/book/book"
 
 [build.environment]
-GO_VERSION = "1.24.13"
+GO_VERSION = "1.25.9"
 
 # Standard Netlify redirects
 [[redirects]]