Fix job reference in README (#520)

Mistakenly added used `job` function instead of `job_with_argument` function

README.rst

@@ -46,7 +46,7 @@ Usage
     def job_with_argument(name):
         print(f"I am {name}")
         
-    schedule.every(10).seconds.do(job, name="Peter")
+    schedule.every(10).seconds.do(job_with_argument, name="Peter")
         
     while True:
         schedule.run_pending()