chore(deps): update docker.io/golang docker tag to v1.26 (#6121)

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

.woodpecker/binaries.yaml

@@ -7,7 +7,7 @@ when:
       - .woodpecker/binaries.yaml
 
 variables:
-  - &golang_image 'docker.io/golang:1.25'
+  - &golang_image 'docker.io/golang:1.26'
   - &node_image 'docker.io/node:24-alpine'
   - &xgo_image 'docker.io/techknowlogick/xgo:go-1.25.x'
 

.woodpecker/docker.yaml

@@ -1,5 +1,5 @@
 variables:
-  - &golang_image 'docker.io/golang:1.25'
+  - &golang_image 'docker.io/golang:1.26'
   - &node_image 'docker.io/node:24-alpine'
   - &xgo_image 'docker.io/techknowlogick/xgo:go-1.25.x'
   - &buildx_plugin 'docker.io/woodpeckerci/plugin-docker-buildx:6.0.4'

.woodpecker/docs.yaml

@@ -1,5 +1,5 @@
 variables:
-  - &golang_image 'docker.io/golang:1.25'
+  - &golang_image 'docker.io/golang:1.26'
   - &node_image 'docker.io/node:24-alpine'
   - &alpine_image 'docker.io/alpine:3.23'
   - path: &when_path

.woodpecker/test.yaml

@@ -1,5 +1,5 @@
 variables:
-  - &golang_image 'docker.io/golang:1.25'
+  - &golang_image 'docker.io/golang:1.26'
   - &when
     - path: &when_path # related config files
         - '.woodpecker/test.yaml'

docker/Dockerfile.agent.alpine.multiarch

@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM docker.io/golang:1.25 AS build
+FROM --platform=$BUILDPLATFORM docker.io/golang:1.26 AS build
 
 WORKDIR /src
 COPY . .

docker/Dockerfile.agent.multiarch

@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM docker.io/golang:1.25 AS build
+FROM --platform=$BUILDPLATFORM docker.io/golang:1.26 AS build
 
 RUN groupadd -g 1000 woodpecker && \
   useradd -u 1000 -g 1000 woodpecker && \

docker/Dockerfile.cli.alpine.multiarch.rootless

@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM docker.io/golang:1.25 AS build
+FROM --platform=$BUILDPLATFORM docker.io/golang:1.26 AS build
 
 WORKDIR /src
 COPY . .

docker/Dockerfile.cli.multiarch.rootless

@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM docker.io/golang:1.25 AS build
+FROM --platform=$BUILDPLATFORM docker.io/golang:1.26 AS build
 
 RUN groupadd -g 1000 woodpecker && \
   useradd -u 1000 -g 1000 woodpecker

docker/Dockerfile.make

@@ -1,5 +1,5 @@
 # docker build --rm -f docker/Dockerfile.make -t woodpecker/make:local .
-FROM docker.io/golang:1.25-alpine AS golang_image
+FROM docker.io/golang:1.26-alpine AS golang_image
 FROM docker.io/node:24-alpine
 
 RUN apk add --no-cache --update make gcc binutils-gold musl-dev && \

docker/Dockerfile.server.multiarch.rootless

@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM docker.io/golang:1.25 AS build
+FROM --platform=$BUILDPLATFORM docker.io/golang:1.26 AS build
 
 RUN groupadd -g 1000 woodpecker && \
   useradd -u 1000 -g 1000 woodpecker && \