fix: samples/server/petstore/springboot-virtualan/pom.xml to reduce v…

…ulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGHSQLDB-3040860

samples/server/petstore/springboot-virtualan/pom.xml

@@ -81,7 +81,7 @@
         <dependency>
             <groupId>org.hsqldb</groupId>
             <artifactId>hsqldb</artifactId>
-            <version>2.5.0</version>
+            <version>2.7.1</version>
         </dependency>
     <!-- END Virtual Service API support -->
         <dependency>