chore(deps): update golang docker tag to v1.26.1

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Dockerfile

@@ -1,7 +1,7 @@
 # Copyright (c) 2026 VEXXHOST, Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM golang:1.26.0@sha256:fb612b7831d53a89cbc0aaa7855b69ad7b0caf603715860cf538df854d047b84 AS builder
+FROM golang:1.26.1@sha256:595c7847cff97c9a9e76f015083c481d26078f961c9c8dca3923132f51fe12f1 AS builder
 WORKDIR /src
 COPY go.mod go.sum /src/
 RUN go mod download