chore(deps): update docker.elastic.co/logstash/logstash-oss docker tag to v7.16.3 (#105)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

elastic-stack/logstash/Dockerfile

@@ -1,5 +1,5 @@
 # https://github.com/elastic/logstash-docker
-FROM docker.elastic.co/logstash/logstash-oss:7.16.2
+FROM docker.elastic.co/logstash/logstash-oss:7.16.3
 RUN logstash-plugin install logstash-input-http
 
 # Add your logstash plugins setup here