Polish

See gh-35553

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/WelcomePageNotAcceptableHandlerMapping.java

@@ -16,8 +16,8 @@
 
 package org.springframework.boot.autoconfigure.web.servlet;
 
-import javax.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
+import jakarta.servlet.http.HttpServletResponse;
 
 import org.springframework.boot.autoconfigure.template.TemplateAvailabilityProviders;
 import org.springframework.context.ApplicationContext;