Correct npm's capitalization in summary (#444)

src/main.rs

@@ -307,7 +307,7 @@ fn run() -> Result<()> {
     }
 
     if config.should_run(Step::Node) {
-        runner.execute("NPM", || node::run_npm_upgrade(&base_dirs, run_type))?;
+        runner.execute("npm", || node::run_npm_upgrade(&base_dirs, run_type))?;
         runner.execute("yarn", || node::yarn_global_update(run_type))?;
     }