Bump javax.servlet:servlet-api in /docs/examples/MavenExample (#846)

Author: dependabot[bot]

docs/examples/MavenExample/pom.xml

@@ -43,7 +43,7 @@
     <dependency>
         <groupId>javax.servlet</groupId>
         <artifactId>servlet-api</artifactId>
-        <version>2.4</version>
+        <version>2.5</version>
         <scope>provided</scope>
     </dependency>
   </dependencies>