Updated ratings POST API version as v2

src/main/java/org/sunbird/ratings/controller/RatingsController.java

@@ -51,7 +51,7 @@ public ResponseEntity<?> ratingLookUp(@RequestBody LookupRequest request) {
         return new ResponseEntity<>(response, response.getResponseCode());
     }
 
-    @PostMapping("/ratings/v1/read")
+    @PostMapping("/ratings/v2/read")
     public ResponseEntity<?> readRating(@RequestBody Map<String, Object> request) {
         SBApiResponse response = ratingService.readRatings(request);
         return new ResponseEntity<>(response, response.getResponseCode());