Consistently use mutable ArrayList for modulesToInstall vs modules

Closes gh-30751

spring-web/src/main/java/org/springframework/http/converter/json/Jackson2ObjectMapperBuilder.java

@@ -581,7 +581,7 @@ public class Jackson2ObjectMapperBuilder {
 	 * @see com.fasterxml.jackson.databind.Module
 	 */
 	public Jackson2ObjectMapperBuilder modulesToInstall(Module... modules) {
-		this.modules = Arrays.asList(modules);
+		this.modules = new ArrayList<>(Arrays.asList(modules));
 		this.findWellKnownModules = true;
 		return this;
 	}