deps: bump Go to 1.26.4 across go.mod, Dockerfiles, GH Actions

Workspace-wide sync. luxfi/node already shipped on 1.26.4 in v1.30.6
(commit 121aca1fa9); this is the cross-repo catch-up.

.github/workflows/ci.yaml

@@ -12,7 +12,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: "1.25.x"
+          go-version: "1.26.4.x"
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v9
         with:
@@ -68,7 +68,7 @@ jobs:
           ruby-version: 2.7
       - uses: actions/setup-go@v5
         with:
-          go-version: "1.25.x"
+          go-version: "1.26.4.x"
 
       - uses: docker/setup-qemu-action@v3
       - uses: docker/setup-buildx-action@v3

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
 
       - uses: actions/setup-go@v5
         with:
-          go-version: '1.24'
+          go-version: '1.26.4'
 
       - name: Build CLI binaries
         run: |

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.25-alpine3.21 AS builder
+FROM golang:1.26.4-alpine3.21 AS builder
 ARG VERSION
 
 RUN apk add --no-cache git gcc musl-dev make

go.mod

@@ -1,6 +1,6 @@
 module github.com/golang-migrate/migrate/v4
 
-go 1.26.3
+go 1.26.4
 
 require (
 	cloud.google.com/go/spanner v1.85.0