fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHETOMCATEMBED-9396739

Author: snyk-bot

pom.xml

@@ -18,7 +18,7 @@
         <dependency>
             <groupId>org.tinystruct</groupId>
             <artifactId>tinystruct</artifactId>
-            <version>1.5.5</version>
+            <version>1.6.1</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.apache.groovy/groovy -->
         <dependency>