Fix psu tasks:healthy action output

when an error occurs

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - Running concurrently `psu` commands should work now, by creating unique temporary file names
+- Fix `psu tasks:healthy` action output, when an error occurs
 
 ## [1.2.0] - 2021-09-14
 ### Added

psu

@@ -1234,9 +1234,15 @@ tasks() {
 tasks_healthy() {
   local tasks_running
   tasks_running=$(tasks 'running' 'running')
+  if [ $? -ne 0 ]; then
+    exit 0
+  fi
   local tasks_job_complete
   tasks_job_complete=$(tasks 'shutdown' 'complete')
-  echo "$(echo "${tasks_running}${tasks_job_complete}" | jq -sjc 'add | unique_by(.ID)')"
+  if [ $? -ne 0 ]; then
+    exit 0
+  fi
+  echo "${tasks_running}${tasks_job_complete}" | jq -sjc 'add | unique_by(.ID)'
 }
 
 services() {