Added npx all-contributors generate command to running script section

README.md

@@ -11,3 +11,4 @@ Contributor on issue is one who has done either of
 3. npm script.js
 4. copy the standard output lines like "npx all-contributors add ..." and paste them on terminal
 5. for android app developers, there will be a contributors.xml file with contributors and their gitlab profile url as xml string array resources
+6. copy the .all-contributorsrc file to the target repository directory and run `npx all-contributors generate`