Merge pull request #5552 from influxdata/fix-docker-compose-example

fix(v2): missing volumes section in Docker compose example

Author: jstirnaman

content/influxdb/v2/install/use-docker-compose.md

@@ -76,6 +76,9 @@ Follow steps to set up and run InfluxDB using Docker Compose and `secrets`:
        file: ~/.env.influxdb2-admin-password
      influxdb2-admin-token:
        file: ~/.env.influxdb2-admin-token
+   volumes:
+     influxdb2-data:
+     influxdb2-config:
     ```
 
 3. For each secret in `compose.yaml`, create a file that contains the secret