fixed triton/spearhead in eval output

lib/do_env.js

@@ -160,7 +160,7 @@ function do_env(subcmd, opts, args, cb) {
     });
 
     p('# Run this command to configure your shell:');
-    p('#     eval "$(triton env%s%s)"',
+    p('#     eval "$(spearhead env%s%s)"',
         (shortOpts ? ' -'+shortOpts : ''),
         (profile.name === this.tritonapi.profile.name
             ? '' : ' ' + profile.name));