fix(build): pin camunda-dmn-model to a specific version

We get dependency convergence error while releasing 8.2.30. That is,
camunda-dmn-model depends on camunda-xml-model:jar:7.18.0 while zeebe-bpmn-model
depends on 7.22.0-alpha3. To fix the issue, we can pin the version to the upgraded one.

pom.xml

@@ -50,7 +50,7 @@
     <dependency.assertj.version>3.24.2</dependency.assertj.version>
     <dependency.awaitility.version>4.2.0</dependency.awaitility.version>
     <dependency.bytebuddy.version>1.14.3</dependency.bytebuddy.version>
-    <dependency.camundamodel.version>7.18.0</dependency.camundamodel.version>
+    <dependency.camundamodel.version>7.22.0-alpha3</dependency.camundamodel.version>
     <dependency.classgraph.version>4.8.157</dependency.classgraph.version>
     <dependency.commons.version>3.12.0</dependency.commons.version>
     <dependency.errorprone.version>2.18.0</dependency.errorprone.version>