fix: close missing } braces in circuit breaker mapping objects (malformed JSON)

deploy/grafana/provisioning/dashboards/broad-announce-overview.json

@@ -131,7 +131,7 @@
         "defaults": {
           "color": {"mode": "thresholds"},
           "mappings": [
-            {"options": {"0": {"text": "CLOSED"}}, {"options": {"1": {"text": "HALF-OPEN"}}, {"options": {"2": {"text": "OPEN"}}}],
+            {"options": {"0": {"text": "CLOSED"}}}, {"options": {"1": {"text": "HALF-OPEN"}}}, {"options": {"2": {"text": "OPEN"}}}],
           "thresholds": {
             "mode": "absolute",
             "steps": [