chore: fix typo in README

README.md

@@ -9,7 +9,7 @@ use mquery::{Auth, QueryManager, query};
 async fn main() {
     dotenv::dotenv().expect("No .env file found in working dir");
     let url = std::env::var("VM_URL").expect("VM URL not found in env");
-    let token = std::env::var("VM_TOKEN").expect("VM URL not found in env");
+    let token = std::env::var("VM_TOKEN").expect("VM token not found in env");
 
     let mut query = query::Metric::new("total_http_requests");
     query.label_eq("method", "get");