Add more nullability annotations to

buildpack/spring-boot-buildpack-platform

See gh-46587

buildpack/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/build/BuildRequest.java

@@ -359,7 +359,7 @@ public class BuildRequest {
 	 * @return an updated build request
 	 * @since 2.6.0
 	 */
-	public BuildRequest withNetwork(String network) {
+	public BuildRequest withNetwork(@Nullable String network) {
 		return new BuildRequest(this.name, this.applicationContent, this.builder, this.trustBuilder, this.runImage,
 				this.creator, this.env, this.cleanCache, this.verboseLogging, this.pullPolicy, this.publish,
 				this.buildpacks, this.bindings, network, this.tags, this.buildWorkspace, this.buildCache,

buildpack/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/build/BuilderDockerConfiguration.java

@@ -46,7 +46,7 @@ public record BuilderDockerConfiguration(@Nullable DockerConnectionConfiguration
 		return withConnection(new DockerConnectionConfiguration.Context(context));
 	}
 
-	public BuilderDockerConfiguration withHost(String address, boolean secure, String certificatePath) {
+	public BuilderDockerConfiguration withHost(String address, boolean secure, @Nullable String certificatePath) {
 		return withConnection(new DockerConnectionConfiguration.Host(address, secure, certificatePath));
 	}