Bump golang from 1.25.2 to 1.25.3 in /docker

Bumps golang from 1.25.2 to 1.25.3.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.25.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docker/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.25.2 AS builder
+FROM golang:1.25.3 AS builder
 
 ARG GOPROXY="https://proxy.golang.org,direct"
 ENV GOPROXY=$GOPROXY