Bump avaje-jsonb.version from 1.8 to 1.9

Bumps `avaje-jsonb.version` from 1.8 to 1.9.

Updates `io.avaje:avaje-jsonb` from 1.8 to 1.9
- [Release notes](https://github.com/avaje/avaje-jsonb/releases)
- [Commits](avaje/avaje-jsonb@1.8...1.9)

Updates `io.avaje:avaje-jsonb-generator` from 1.8 to 1.9

---
updated-dependencies:
- dependency-name: io.avaje:avaje-jsonb
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: io.avaje:avaje-jsonb-generator
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

acceptance-tests/acceptance-tests-avaje-jsonb/pom.xml

@@ -31,7 +31,7 @@
   <description>Acceptance tests for Avaje JSONB.</description>
 
   <properties>
-    <avaje-jsonb.version>1.8</avaje-jsonb.version>
+    <avaje-jsonb.version>1.9</avaje-jsonb.version>
     <jsonassert.version>1.5.1</jsonassert.version>
   </properties>