Merge pull request #856 from PaddlePaddle/dependabot/maven/java/examples/junit-junit-4.13.1

Bump junit from 4.11 to 4.13.1 in /java/examples

java/examples/pom.xml

@@ -75,7 +75,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.11</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>