build(deps): bump com.graphql-java:graphql-java-extended-scalars

Bumps [com.graphql-java:graphql-java-extended-scalars](https://github.com/graphql-java/graphql-java-extended-scalars) from 19.0 to 21.0.
- [Release notes](https://github.com/graphql-java/graphql-java-extended-scalars/releases)
- [Commits](graphql-java/graphql-java-extended-scalars@19.0...v21.0)

---
updated-dependencies:
- dependency-name: com.graphql-java:graphql-java-extended-scalars
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -97,7 +97,7 @@
     FIXME this needs to be synced with the vertx version - is there a BOM to use or something?
     https://github.com/vert-x3/vertx-web/blob/${io.vertx.web.version}/vertx-web-graphql/pom.xml#L35
   -->
-  <com.graphql.java.extended.scalars.version>19.0</com.graphql.java.extended.scalars.version>
+  <com.graphql.java.extended.scalars.version>21.0</com.graphql.java.extended.scalars.version>
   <com.nimbusds.jose.jwt.version>9.31</com.nimbusds.jose.jwt.version>
   <org.bouncycastle.version>1.74</org.bouncycastle.version>
   <org.jasypt.version>1.9.3</org.jasypt.version>