Fix typo in comment

Author: fedorskvorcov

service-locator/src/main/java/com/iluwatar/servicelocator/ServiceLocator.java

@@ -50,7 +50,7 @@ public static Service getService(String serviceJndiName) {
       return serviceObj;
     } else {
       /*
-       * If we are unable to retrive anything from cache, then lookup the service and add it in the
+       * If we are unable to retrieve anything from cache, then lookup the service and add it in the
        * cache map
        */
       var ctx = new InitContext();