Add office hours to inputs

To be included when posting a warning or unassign message

Author: jun-hara

action.yml

@@ -21,6 +21,10 @@ inputs:
     description: 'Message posted on issue as unassign warning'
     required: false
     default: "Thanks for picking up this issue and supporting this project! It looks like there hasn’t been any activity on this ticket in a while. To keep things moving, you will be unassigned from this issue soon if there’s no new activity on it by then. But we encourage you to pick this issue (or a new one) back up in the future!"
+  office_hours:
+    description: 'Slack office hours included in warning or unassign message'
+    required: false
+    default: ''
 runs:
   using: 'node12'
-  main: 'index.js'
+  main: 'index.js'