Bump alpine from 3.18.2 to 3.18.3

Bumps alpine from 3.18.2 to 3.18.3.

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

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

Dockerfile

@@ -12,7 +12,7 @@ RUN go get github.com/robfig/glock
 RUN glock sync -n < GLOCKFILE
 RUN go install
 
-FROM alpine:3.18.2
+FROM alpine:3.18.3
 LABEL maintainer "Fco. Javier Delgado del Hoyo <frandelhoyo@gmail.com>"
 
 RUN apk add --update \