Bump golang in /build in the all group across 1 directory

Bumps the all group with 1 update in the /build directory: golang.


Updates `golang` from 1.26.2 to 1.26.3

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.26.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: all
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build/Dockerfile.release

@@ -11,7 +11,7 @@
 # without messing up file permissions, since the Docker container doesn't run as
 # your actual user.
 
-FROM golang:1.26.2 AS build
+FROM golang:1.26.3 AS build
 
 ENV GO111MODULE=on
 WORKDIR /go/src/planetscale.dev/vitess-operator