Use Servlet 3.1 so that annotation scanning is triggered.

PiperOrigin-RevId: 807961122
Change-Id: I7d3bc779cba725800e7a2cd8bd5787b0c65998cf

Author: ludoch

README.md

@@ -17,7 +17,7 @@
 [![Maven][maven-version-image]][maven-version-link]
 [![Code of conduct](https://img.shields.io/badge/%E2%9D%A4-code%20of%20conduct-blue.svg)](https://github.com/GoogleCloudPlatform/appengine-java-standard/blob/main/CODE_OF_CONDUCT.md)
 
-# Google App Engine Standard Environment Source Code for Java 17, Java 21, Java25
+# Google App Engine Standard Environment Source Code for Java 17, Java 21, Java 25.
 
 
 This repository contains the Java Source Code for [Google App Engine

e2etests/testlocalapps/allinone/src/main/webapp/WEB-INF/web.xml

@@ -14,11 +14,11 @@
  See the License for the specific language governing permissions and
  limitations under the License.
 -->
-<web-app xmlns="http://java.sun.com/xml/ns/javaee"
-  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
-     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
-  version="2.5">
+<web-app  xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
+     http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
+    version="3.1">
 
   <servlet>
     <servlet-name>main</servlet-name>

e2etests/testlocalapps/allinone_jakarta/src/main/webapp/WEB-INF/web.xml

@@ -14,11 +14,11 @@
  See the License for the specific language governing permissions and
  limitations under the License.
 -->
-<web-app xmlns="http://java.sun.com/xml/ns/javaee"
-  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
-     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
-  version="2.5">
+<web-app  xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
+     http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
+    version="3.1">
 
   <servlet>
     <servlet-name>main</servlet-name>