chore(deps): update docker/dockerfile docker tag to v1.26.0

Dockerfile

@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.25.0@sha256:0adf442eae370b6087e08edc7c50b552d80ddf261576f4ebd6421006b2461f12
+# syntax=docker/dockerfile:1.26.0@sha256:ecfaec9ed6d810b56388c508f4121597bfbba70d41a6dfeee4d8cad5f295fc32
 # =============================================================================
 # Multi-architecture build
 # =============================================================================
@@ -32,10 +32,10 @@ FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.9.0@sha256:c64defb9ed5a91eacb37f9
 # =============================================================================
 # Stage 1: Build Tailscale combined binary (cross-compiled, runs natively)
 # =============================================================================
-FROM --platform=$BUILDPLATFORM golang:1.26.6-alpine@sha256:3889b425f035be855a72fb4755265311293b6d414521f0a519d819df32222d83 AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26.5-alpine@sha256:0178a641fbb4858c5f1b48e34bdaabe0350a330a1b1149aabd498d0699ff5fb2 AS builder
 
 # renovate: datasource=github-releases depName=tailscale packageName=tailscale/tailscale versioning=semver
-ARG TAILSCALE_VERSION=v1.102.3
+ARG TAILSCALE_VERSION=v1.102.2
 
 # Provided automatically by buildx for the target platform.
 ARG TARGETOS