[KafkaBridge] - invalid json fix

[see-quick]

There was a problem for the Grafana controller loading current Bridge dashboard because of the problem:

2024-02-19T12:43:47Z	ERROR	GrafanaDashboardReconciler	failed to prepare dashboard model	{"controller": "grafanadashboard", "controllerGroup": "grafana.integreatly.org", "controllerKind": "GrafanaDashboard", "GrafanaDashboard": {"name":"strimzi-kafka-bridge","namespace":"tealc-monitoring"}, "namespace": "tealc-monitoring", "name": "strimzi-kafka-bridge", "reconcileID": "4c0c3375-9e61-4dd3-8825-60ce140b765b", "dashboard": "strimzi-kafka-bridge", "error": "invalid character ']' looking for beginning of value"}

This should resolve it. I already applied such a fix to our infra and it works

[github-actions]

Thanks for pull request!!!
hey @kornys @Frawless @obabec