chore(deps): update docker.io/library/golang docker tag to v1.26.3 (#27742)

Signed-off-by: renovate[bot] <renovate[bot]@users.noreply.github.com>
Co-authored-by: argoproj-renovate[bot] <161757507+argoproj-renovate[bot]@users.noreply.github.com>

Author: argoproj-renovate[bot]

Dockerfile

@@ -4,7 +4,7 @@ ARG BASE_IMAGE=docker.io/library/ubuntu:25.10@sha256:4a9232cc47bf99defcc8860ef62
 # Initial stage which pulls prepares build dependencies and CLI tooling we need for our final image
 # Also used as the image in CI jobs so needs all dependencies
 ####################################################################################################
-FROM docker.io/library/golang:1.26.2@sha256:b54cbf583d390341599d7bcbc062425c081105cc5ef6d170ced98ef9d047c716 AS builder
+FROM docker.io/library/golang:1.26.3@sha256:efaccb5b497e90df3ebe5216cc25cd9f98e73874e2d638b56e38d4a3f098c41c AS builder
 
 WORKDIR /tmp
 
@@ -109,7 +109,7 @@ RUN HOST_ARCH=$TARGETARCH NODE_ENV='production' NODE_ONLINE_ENV='online' NODE_OP
 ####################################################################################################
 # Argo CD Build stage which performs the actual build of Argo CD binaries
 ####################################################################################################
-FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.26.2@sha256:b54cbf583d390341599d7bcbc062425c081105cc5ef6d170ced98ef9d047c716 AS argocd-build
+FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.26.3@sha256:efaccb5b497e90df3ebe5216cc25cd9f98e73874e2d638b56e38d4a3f098c41c AS argocd-build
 
 WORKDIR /go/src/github.com/argoproj/argo-cd
 

Dockerfile.tilt

@@ -1,4 +1,4 @@
-FROM docker.io/library/golang:1.26.2@sha256:b54cbf583d390341599d7bcbc062425c081105cc5ef6d170ced98ef9d047c716
+FROM docker.io/library/golang:1.26.3@sha256:efaccb5b497e90df3ebe5216cc25cd9f98e73874e2d638b56e38d4a3f098c41c
 
 ENV DEBIAN_FRONTEND=noninteractive