Replaced "Constructor" by "constructor" in URL

src/core/lombok/RequiredArgsConstructor.java

@@ -30,7 +30,7 @@ import java.lang.annotation.Target;
  * Generates a constructor with required arguments.
  * Required arguments are final fields and fields with constraints such as {@code @NonNull}.
  * <p>
- * Complete documentation is found at <a href="https://projectlombok.org/features/Constructor">the project lombok features page for &#64;Constructor</a>.
+ * Complete documentation is found at <a href="https://projectlombok.org/features/constructor">the project lombok features page for &#64;Constructor</a>.
  * <p>
  * Even though it is not listed, this annotation also has the {@code onConstructor} parameter. See the full documentation for more details.
  *