Rename metric mysql_info_schema_processlist_threads -> mysql_info_schema_processlist_threads in Grafana dashboard

Author: Alexander Avdonin

Diff for: mysqld-mixin/dashboards/mysql-overview.json

@@ -2496,7 +2496,7 @@
           "calculatedInterval": "2m",
           "datasourceErrors": {},
           "errors": {},
-          "expr": "mysql_info_schema_threads{job=~\"$job\", instance=~\"$instance\"}",
+          "expr": "mysql_info_schema_processlist_threads{job=~\"$job\", instance=~\"$instance\"}",
           "format": "time_series",
           "interval": "1m",
           "intervalFactor": 1,
@@ -2608,7 +2608,7 @@
           "calculatedInterval": "2m",
           "datasourceErrors": {},
           "errors": {},
-          "expr": "topk(5, avg_over_time(mysql_info_schema_threads{job=~\"$job\", instance=~\"$instance\"}[$__rate_interval]))",
+          "expr": "topk(5, avg_over_time(mysql_info_schema_processlist_threads{job=~\"$job\", instance=~\"$instance\"}[$__rate_interval]))",
           "interval": "1m",
           "intervalFactor": 1,
           "legendFormat": "{{ state }}",