NonNullApi annotation -> NullMarked annotation

Author: jjohannes

src/main/java/org/gradlex/buildparameters/package-info.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-@NonNullApi
+@NullMarked
 package org.gradlex.buildparameters;
 
-import org.gradle.api.NonNullApi;
+import org.jspecify.annotations.NullMarked;