Fix selection of 70k RXS sensor

roles/ska_proto_status_server/templates/rxs_dashboard.json

@@ -235,6 +235,7 @@
           "measurement": "rxs_monitor",
           "orderByTime": "ASC",
           "policy": "default",
+          "query": "SELECT mean(\"rxs_tempvac_temp70k\") FROM \"rxs_monitor\" WHERE (\"pipeline_id\" =~ /^$RXS$/) AND $timeFilter GROUP BY time($__interval) fill(none)",
           "refId": "B",
           "resultFormat": "time_series",
           "select": [