build: bump alpine from 3.17.3 to 3.18.0

Bumps alpine from 3.17.3 to 3.18.0.

---
updated-dependencies:
- dependency-name: alpine
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Dockerfile

@@ -13,7 +13,7 @@ RUN go mod download
 # Build the docker-gen executable
 RUN GOOS=linux CGO_ENABLED=0 go build -ldflags "-X main.buildVersion=${DOCKER_GEN_VERSION}" -o docker-gen ./cmd/docker-gen
 
-FROM alpine:3.17.3
+FROM alpine:3.18.0
 
 ARG DOCKER_GEN_VERSION
 ENV DOCKER_GEN_VERSION=${DOCKER_GEN_VERSION} \