refactoring: issue#2376 (#2491)

Changed all the switch expression according to the JAVA 17.

sharding/src/main/java/com/iluwatar/sharding/RangeShardManager.java

@@ -45,16 +45,12 @@ public class RangeShardManager extends ShardManager {
   @Override
   protected int allocateShard(Data data) {
     var type = data.getType();
-    switch (type) {
-      case TYPE_1:
-        return 1;
-      case TYPE_2:
-        return 2;
-      case TYPE_3:
-        return 3;
-      default:
-        return -1;
-    }
+    return switch (type) {
+      case TYPE_1 -> 1;
+      case TYPE_2 -> 2;
+      case TYPE_3 -> 3;
+      default -> -1;
+    };
   }
 
 }