Use |default instead of merely casting to bool

group_vars/matrix_servers

@@ -2106,7 +2106,7 @@ matrix_prometheus_scraper_node_targets: "{{ ['matrix-prometheus-node-exporter:91
 matrix_prometheus_scraper_postgres_enabled: "{{ matrix_prometheus_postgres_exporter_enabled }}"
 matrix_prometheus_scraper_postgres_targets: "{{ ['matrix-prometheus-postgres-exporter:'+ matrix_prometheus_postgres_exporter_port|string] if matrix_prometheus_scraper_postgres_enabled else [] }}"
 
-matrix_prometheus_scraper_hookshot_enabled: "{{ matrix_hookshot_metrics_enabled|bool }}"
+matrix_prometheus_scraper_hookshot_enabled: "{{ matrix_hookshot_metrics_enabled|default(false) }}"
 matrix_prometheus_scraper_hookshot_targets: "{{ [matrix_hookshot_container_url|string +':'+ matrix_hookshot_metrics_port|string] if matrix_hookshot_metrics_enabled else [] }}"
 
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