Bump golang from 1.24.2 to 1.24.3 (gardener#264)

Bumps golang from 1.24.2 to 1.24.3.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.24.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Dockerfile

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 #############      builder                                  #############
-FROM golang:1.24.2 AS builder
+FROM golang:1.24.3 AS builder
 
 WORKDIR /go/src/github.com/gardener/machine-controller-manager-provider-openstack
 COPY . .