Upgrade to Undertow 1.4.26.Final

Closes gh-13880

spring-boot-dependencies/pom.xml

@@ -187,7 +187,7 @@
 		<thymeleaf-extras-data-attribute.version>1.3</thymeleaf-extras-data-attribute.version>
 		<thymeleaf-extras-java8time.version>2.1.0.RELEASE</thymeleaf-extras-java8time.version>
 		<tomcat.version>8.5.34</tomcat.version>
-		<undertow.version>1.4.25.Final</undertow.version>
+		<undertow.version>1.4.26.Final</undertow.version>
 		<unboundid-ldapsdk.version>3.2.1</unboundid-ldapsdk.version>
 		<webjars-hal-browser.version>9f96c74</webjars-hal-browser.version>
 		<webjars-locator.version>0.32-1</webjars-locator.version>

spring-boot/src/main/java/org/springframework/boot/context/embedded/undertow/UndertowEmbeddedServletContainerFactory.java

@@ -483,7 +483,7 @@ public class UndertowEmbeddedServletContainerFactory
 			DeploymentInfo deployment, ServletContextInitializer... initializers) {
 		ServletContextInitializer[] mergedInitializers = mergeInitializers(initializers);
 		Initializer initializer = new Initializer(mergedInitializers);
-		deployment.addServletContainerInitalizer(new ServletContainerInitializerInfo(
+		deployment.addServletContainerInitializer(new ServletContainerInitializerInfo(
 				Initializer.class,
 				new ImmediateInstanceFactory<ServletContainerInitializer>(initializer),
 				NO_CLASSES));