action: add directory input

action.yml

@@ -7,6 +7,10 @@ inputs:
   playbook:
     description: Ansible playbook filepath
     required: true
+  directory:
+    description: Root directory of Ansible project
+    required: false
+    default: ${{github.workspace}}
   key:
     description: SSH private key used to connect to the host
     required: true