fix: upgrade org.immutables:value from 2.8.8 to 2.9.1

Snyk has created this PR to upgrade org.immutables:value from 2.8.8 to 2.9.1.

See this package in Maven Repository:
https://mvnrepository.com/artifact/org.immutables/value/

See this project in Snyk:
https://app.snyk.io/org/ketola/project/2d49b131-fa21-4f41-8223-aa06d4433281?utm_source=github&utm_medium=referral&page=upgrade-pr

pom.xml

@@ -82,7 +82,7 @@
       <dependency>
         <groupId>org.immutables</groupId>
         <artifactId>value</artifactId>
-        <version>2.8.8</version>
+        <version>2.9.1</version>
       </dependency>
       <dependency>
         <groupId>com.fasterxml.jackson.datatype</groupId>