fix boolean logic for overwrite parameter (#47916)

* fix boolean logic for overwrite parameter

* added changelog fragment

changelogs/fragments/47916-grafana_dashboard-fix-logic-behind-overwrite-param.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "reverted change in af55b8e which caused the overwrite parameter to be ignored"

lib/ansible/modules/monitoring/grafana_dashboard.py

@@ -256,7 +256,7 @@ def grafana_create_dashboard(module, data):
             result['changed'] = False
         else:
             # update
-            if 'overwrite' in data and data['overwrite'] == 'yes':
+            if 'overwrite' in data and data['overwrite']:
                 payload['overwrite'] = True
             if 'message' in data and data['message']:
                 payload['message'] = data['message']