Bump com.microsoft.azure:azure-eventhubs in /azure-samples (#1441)

Bumps [com.microsoft.azure:azure-eventhubs](https://github.com/Azure/azure-sdk-for-java) from 1.0.0 to 3.2.1.
- [Release notes](https://github.com/Azure/azure-sdk-for-java/releases)
- [Commits](https://github.com/Azure/azure-sdk-for-java/compare/v1.0.0...azure-cosmos-3.2.1)

---
updated-dependencies:
- dependency-name: com.microsoft.azure:azure-eventhubs
  dependency-type: direct:production
...

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azure-samples/pom.xml

@@ -178,7 +178,7 @@
         <dependency>
             <groupId>com.microsoft.azure</groupId>
             <artifactId>azure-eventhubs</artifactId>
-            <version>1.0.0</version>
+            <version>3.2.1</version>
         </dependency>
     </dependencies>
     <profiles>