fix build error 'Invalid buildpack reference...

fix build error 'Invalid buildpack reference 'gcr.io/paketo-buildpacks/health-checker:latest', see https://blog.paketo.io/posts/paketo-gcr-registry-sunset/

pom.xml

@@ -64,7 +64,7 @@
                         <!-- https://stackoverflow.com/questions/75885269/spring-boot-build-image-with-health-check -->
                         <buildpacks>
                             <buildpack>urn:cnb:builder:paketo-buildpacks/java</buildpack>
-                            <buildpack>gcr.io/paketo-buildpacks/health-checker:latest</buildpack>
+                            <buildpack>docker.io/paketobuildpacks/health-checker:latest</buildpack>
                         </buildpacks>
                     </image>
                 </configuration>