Added terminalbeat to the list of communitybeats (elastic#10037)

libbeat/docs/communitybeats.asciidoc

@@ -31,7 +31,7 @@ https://github.com/hsngerami/hsnburrowbeat[hsnburrowbeat]:: Monitors Kafka consu
 https://github.com/hartfordfive/cloudflarebeat[cloudflarebeat]:: Indexes log entries from the Cloudflare Enterprise Log Share API.
 https://github.com/jarl-tornroos/cloudfrontbeat[cloudfrontbeat]:: Reads log events from Amazon Web Services https://aws.amazon.com/cloudfront/[CloudFront].
 https://github.com/aidan-/cloudtrailbeat[cloudtrailbeat]:: Reads events from Amazon Web Services' https://aws.amazon.com/cloudtrail/[CloudTrail].
-https://github.com/narmitech/cloudwatchmetricbeat[cloudwatchmetricbeat]::  A beat for Amazon Web Services' https://aws.amazon.com/cloudwatch/details/#other-aws-resource-monitoring[CloudWatch Metrics]. 
+https://github.com/narmitech/cloudwatchmetricbeat[cloudwatchmetricbeat]::  A beat for Amazon Web Services' https://aws.amazon.com/cloudwatch/details/#other-aws-resource-monitoring[CloudWatch Metrics].
 https://github.com/e-travel/cloudwatchlogsbeat[cloudwatchlogsbeat]:: Reads log events from Amazon Web Services' https://aws.amazon.com/cloudwatch/details/#log-monitoring[CloudWatch Logs].
 https://github.com/eBay/collectbeat[collectbeat]:: Adds discovery on top of Filebeat and Metricbeat in environments like Kubernetes.
 https://github.com/raboof/connbeat[connbeat]:: Exposes metadata about TCP connections.
@@ -95,6 +95,7 @@ https://github.com/benben/serialbeat[serialbeat]:: Reads from a serial device.
 https://github.com/consulthys/springbeat[springbeat]:: Collects health and metrics data from Spring Boot applications running with the actuator module.
 https://github.com/philkra/springboot2beat[springboot2beat]:: Query and accumulate all metrics endpoints of a Spring Boot 2 web app via the web channel, leveraging the http://micrometer.io/[mircometer.io] metrics facade.
 https://github.com/sentient/statsdbeat[statsdbeat]:: Receives UDP https://github.com/etsy/statsd/wiki[statsd] events from a statsd client.
+https://github.com/live-wire/terminalbeat[terminalbeat]:: Runs an external command and forwards the https://www.computerhope.com/jargon/s/stdout.htm[stdout] for the same to Elasticsearch/Logstash.
 https://github.com/berfinsari/tracebeat[tracebeat]:: Reads traceroute output and indexes them into Elasticsearch.
 https://github.com/buehler/go-elastic-twitterbeat[twitterbeat]:: Reads tweets for specified screen names.
 https://github.com/gravitational/udpbeat[udpbeat]:: Ships structured logs via UDP.