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/go.yml

@@ -25,7 +25,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v6
       with:
-        go-version: 1.26.3
+        go-version: 1.26.4
         cache: false
 
     - name: Run linters
@@ -46,7 +46,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.3'
+          go-version: '1.26.4'
           cache: false
 
       - name: Build
@@ -64,7 +64,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.3'
+          go-version: '1.26.4'
           cache: false
 
       - name: Install cross toolchain

Dockerfile

@@ -4,7 +4,7 @@ ARG VERSION=""
 ARG BUILDNUM=""
 
 # Build Geth in a stock Go builder container
-FROM golang:1.26.3-alpine AS builder
+FROM golang:1.26.4-alpine AS builder
 
 RUN apk add --no-cache gcc musl-dev linux-headers git
 

Dockerfile.alltools

@@ -4,7 +4,7 @@ ARG VERSION=""
 ARG BUILDNUM=""
 
 # Build Geth in a stock Go builder container
-FROM golang:1.26.3-alpine AS builder
+FROM golang:1.26.4-alpine AS builder
 
 RUN apk add --no-cache gcc musl-dev linux-headers git