Fix typo in bundle section of README (#1317)

correct the bundle parameter --to to --outfile

Author: newlandsvalley

README.md

@@ -951,7 +951,7 @@ See the help message for more flags, and [the configuration format section](#the
 When bundling an `app`, the output will be a single executable file:
 
 ```console
-$ spago bundle --to index.js --bundle-type app --platform node
+$ spago bundle --outfile index.js --bundle-type app --platform node
 
 # It is then possible to run it with node:
 $ node index.js