Fix benchmark filtering

axum/benches/benches.rs

@@ -101,7 +101,7 @@ impl BenchmarkBuilder {
         // cargo bench -- routing send-json
         // ```
         let args = std::env::args().collect::<Vec<_>>();
-        if !args.len() == 1 {
+        if args.len() != 1 {
             let names = &args[1..args.len() - 1];
             if !names.is_empty() && !names.contains(&self.name.to_owned()) {
                 return;