chore: comment out versions in .env.example

.env.example

@@ -1,6 +1,6 @@
 GRAFANA_ADMIN_USER=medic
 GRAFANA_ADMIN_PASSWORD=password
-GRAFANA_VERSION=latest
+#GRAFANA_VERSION=latest
 GRAFANA_PORT=3000
 # Use 0.0.0.0 to expose to LAN/Internet, use 127.0.0.1 to
 #    use with reverse proxy (Caddy, Traefik etc)
@@ -10,14 +10,14 @@ GRAFANA_DATA="./grafana/data"
 # Comma separated list of plugins to install
 GRAFANA_PLUGINS=grafana-discourse-datasource
 
-JSON_EXPORTER_VERSION=latest
+#JSON_EXPORTER_VERSION=latest
 
-PROMETHEUS_VERSION=latest
+#PROMETHEUS_VERSION=latest
 # Note: Relative paths do not work with docker-compose v2.x. In that case, simply use an absolute path.
 PROMETHEUS_DATA="./prometheus/data"
 PROMETHEUS_RETENTION_TIME=60d
 
-SQL_EXPORTER_VERSION=latest
+#SQL_EXPORTER_VERSION=latest
 # Use 0.0.0.0 to expose to LAN/Internet, use 127.0.0.1 to
 #    use with reverse proxy (Caddy, Traefik etc)
 SQL_EXPORTER_IP=127.0.0.1