Address code review comments

Signed-off-by: Andriy Redko <drreta@gmail.com>

Author: reta

docker/test-images/zipkin-ui/Dockerfile

@@ -52,7 +52,7 @@ RUN if [ "${RELEASE_FROM_MAVEN_BUILD}" == "false" ]; then /build-bin/maybe_insta
 FROM ghcr.io/openzipkin/alpine:$alpine_version as zipkin-ui
 LABEL org.opencontainers.image.description="NGINX on Alpine Linux hosting the Zipkin UI with Zipkin API proxy_pass"
 # Use latest from https://pkgs.alpinelinux.org/packages?name=nginx
-ARG nginx_version=1.28.3-r0
+ARG nginx_version=1.28.3
 LABEL nginx-version=$nginx_version
 
 ENV ZIPKIN_BASE_URL=http://zipkin:9411

docker/test-images/zipkin-uiproxy/Dockerfile

@@ -28,7 +28,7 @@ COPY docker/test-images/zipkin-uiproxy/nginx.conf /conf.d/zipkin.conf.template
 FROM ghcr.io/openzipkin/alpine:$alpine_version as zipkin-uiproxy
 LABEL org.opencontainers.image.description="NGINX on Alpine Linux proxying the Zipkin UI with proxy_pass"
 # Use latest from https://pkgs.alpinelinux.org/packages?name=nginx
-ARG nginx_version=1.28.3-r0
+ARG nginx_version=1.28.3
 LABEL nginx-version=$nginx_version
 
 ENV ZIPKIN_UI_BASEPATH=/zipkin