chore(deps): Bump io.camunda:zeebe-client-java from 8.8.19 to 8.8.21

Bumps [io.camunda:zeebe-client-java](https://github.com/camunda/camunda) from 8.8.19 to 8.8.21.
- [Release notes](https://github.com/camunda/camunda/releases)
- [Changelog](https://github.com/camunda/camunda/blob/main/CHANGELOG.md)
- [Commits](camunda/camunda@8.8.19...8.8.21)

---
updated-dependencies:
- dependency-name: io.camunda:zeebe-client-java
  dependency-version: 8.8.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

parent/pom.xml

@@ -578,7 +578,7 @@
         <xpp3-version>1.1.4c</xpp3-version>
         <yasson-version>3.0.4</yasson-version>
         <yetus-audience-annotations-version>0.15.1</yetus-audience-annotations-version>
-        <zeebe-version>8.8.19</zeebe-version>
+        <zeebe-version>8.8.21</zeebe-version>
         <zendesk-client-version>1.4.0</zendesk-client-version>
         <zookeeper-version>3.9.5</zookeeper-version>
         <zxing-version>3.5.4</zxing-version>