Bump alpine from 3.18.3 to 3.18.4

Bumps alpine from 3.18.3 to 3.18.4.

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

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

Dockerfile

@@ -8,7 +8,7 @@ RUN apk add git
 RUN GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags="-X 'main.Version=$VERSION'"
 
 
-FROM alpine:3.18.3
+FROM alpine:3.18.4
 
 RUN apk add --no-cache tzdata
 RUN mkdir -p /etc/dnscollector/ /var/dnscollector/