build(deps): bump org.axonframework:axon-bom from 4.8.3 to 4.8.4

Bumps [org.axonframework:axon-bom](https://github.com/AxonFramework/axon-bom) from 4.8.3 to 4.8.4.
- [Release notes](https://github.com/AxonFramework/axon-bom/releases)
- [Commits](AxonFramework/axon-bom@axon-4.8.3...axon-4.8.4)

---
updated-dependencies:
- dependency-name: org.axonframework:axon-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -16,7 +16,7 @@
 
     <properties>
         <java.version>17</java.version>
-        <axon.version>4.8.3</axon.version>
+        <axon.version>4.8.4</axon.version>
         <testcontainers.version>1.18.3</testcontainers.version>
         <skipIntegrationTests>true</skipIntegrationTests>
     </properties>