Update core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDPositiveLongGenerator.java

Minor style issue: put a space between () and { in each of these methods

Co-authored-by: Liam Williams <liam.williams@zoho.com>

core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDPositiveLongGenerator.java

@@ -8,7 +8,7 @@ import java.util.UUID;
  */
 @SuppressWarnings("unused")
 public class UUIDPositiveLongGenerator {
-    public long getLeastSignificantBits(){
+    public long getLeastSignificantBits() {
         return Math.abs(UUID.randomUUID().getLeastSignificantBits());
     }