Update go to v1.26.1

Author: gardener-ci-robot

.github/workflows/build.yaml

@@ -64,7 +64,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v6
         with:
-          go-version: '1.26.0'
+          go-version: '1.26.1'
       - uses: gardener/cc-utils/.github/actions/trusted-checkout@master
       - uses: gardener/cc-utils/.github/actions/setup-git-identity@master
       - name: run-verify

Dockerfile

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 ############# builder
-FROM golang:1.26.0 AS builder
+FROM golang:1.26.1 AS builder
 
 WORKDIR /go/src/github.com/gardener/gardener-extension-image-rewriter