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] <support@github.com>

Author: dependabot[bot]

Dockerfile

@@ -6,7 +6,7 @@ ARG BIN_NAME
 ARG TARGETARCH
 RUN GOARCH=${TARGETARCH} /builder.sh ${BIN_NAME}
 
-FROM alpine:3.18.3
+FROM alpine:3.18.4
 RUN apk add --no-cache gcompat
 
 # https://pkg.go.dev/net#hdr-Name_Resolution