fix: pulsar-client-cpp/docker/alpine/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE311-ZLIB-2977081

Author: snyk-bot

pulsar-client-cpp/docker/alpine/Dockerfile

@@ -18,7 +18,7 @@
 #
 
 
-FROM alpine:3.11
+FROM alpine:3.23.2
 
 RUN apk update \
     && apk upgrade \