Update storing-time-series-data.md (#152)

True up variables for InfluxDB v2 with what's in /etc/s6-overlay/scripts/telegraf and https://sdr-enthusiasts.gitbook.io/ads-b/useful-extras/alternative-graphing-with-influx-grafana

useful-extras/storing-time-series-data.md

@@ -14,13 +14,13 @@ These variables control the sending of flight data and readsb metrics to [Influx
 
 | Variable | Description | Default |
 |----------|-------------|---------|
-| `INFLUXDBURL` | The full HTTP URL for your InfluxDB instance. Required for both InfluxDB v1 and v2. | Unset |
+| `INFLUXDBURL` | The full HTTP URL for your InfluxDB instance. Not required for both InfluxDB v2. | Unset |
 | `INFLUXDBUSERNAME` | If using authentication, a username for your InfluxDB instance. If not using authentication, leave unset. Not required for InfluxDB v2. | Unset |
 | `INFLUXDBPASSWORD` | If using authentication, a password for your InfluxDB instance. If not using authentication, leave unset. Not required for InfluxDB v2. | Unset |
-| `INFLUXDB_V2` | Set to a non empty value to enable InfluxDB V2 output. | Unset |
-| `INFLUXDB_V2_BUCKET` | Required if `INFLUXDB_V2` is set, bucket must already exist in your InfluxDB v2 instance. | Unset |
-| `INFLUXDB_V2_ORG` | Required if `INFLUXDB_V2` is set. | Unset |
-| `INFLUXDB_V2_TOKEN` | Required if `INFLUXDB_V2` is set. | Unset |
+| `INFLUXDBV2_URL` | The full HTTP URL for your InfluxDB v2 instance. Required for v2. | Unset |
+| `INFLUXDBV2_BUCKET` | Required if `INFLUXDB_V2` is set; bucket must already exist in your InfluxDB v2 instance. | Unset |
+| `INFLUXDBV2_ORG` | Required if `INFLUXDB_V2` is set. | Unset |
+| `INFLUXDBV2_TOKEN` | Required if `INFLUXDB_V2` is set. | Unset |
 | `INFLUXDB_SKIP_AIRCRAFT` | Set to any value to skip publishing aircraft data to InfluxDB to minimize bandwidth and database size. | Unset |
 
 ## InfluxDB Schema