chore(chronograf/alpine): update to chrono 1.7.16

Author: russorat

chronograf/1.7/alpine/Dockerfile

@@ -4,7 +4,7 @@ RUN echo 'hosts: files dns' >> /etc/nsswitch.conf
 RUN apk add --no-cache ca-certificates && \
     update-ca-certificates
 
-ENV CHRONOGRAF_VERSION 1.7.14
+ENV CHRONOGRAF_VERSION 1.7.16
 
 RUN set -ex && \
     apk add --no-cache --virtual .build-deps wget gnupg tar && \