Bump observer_cli to 1.6.2

(cherry picked from commit e186f51)

Author: michaelklishin

rabbitmq-components.mk

@@ -117,7 +117,7 @@ dep_prometheus = hex 4.6.0
 dep_ra = hex 1.1.8
 dep_ranch = hex 2.0.0
 dep_recon = hex 2.5.1
-dep_observer_cli = hex 1.6.1
+dep_observer_cli = hex 1.6.2
 dep_stdout_formatter = hex 0.2.4
 dep_sysmon_handler = hex 1.3.0