Bump org.junit:junit-bom from 6.1.2 to 6.1.3 in examples (#589)

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examples/fabric-contract-example-maven/pom.xml

@@ -32,7 +32,7 @@
             <dependency>
                 <groupId>org.junit</groupId>
                 <artifactId>junit-bom</artifactId>
-                <version>6.1.2</version>
+                <version>6.1.3</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>