Update alpine Docker tag to v3.19.1

Dockerfile

@@ -21,7 +21,7 @@ COPY mutatingwebhook.go .
 RUN go install .
 
 # production image ############################################
-FROM alpine:3.19.0@sha256:51b67269f354137895d43f3b3d810bfacd3945438e94dc5ac55fdac340352f48 AS prod
+FROM alpine:3.19.1@sha256:c5b1261d6d3e43071626931fc004f70149baeba2c8ec672bd4f27761f8e1ad6b AS prod
 RUN apk add --no-cache ca-certificates
 
 COPY --from=build-env /go/bin/ingress-waf-admission-controller /bin/admission-controller