Fix error about keyvault-starter version. (Azure#18850)

Author: Rujun Chen

sdk/spring/azure-spring-boot-test-keyvault/pom-reactive.xml

@@ -19,7 +19,7 @@
     <dependency>
       <groupId>com.azure.spring</groupId>
       <artifactId>azure-spring-boot-starter-keyvault-secrets</artifactId>
-      <version>3.1.0</version> <!-- {x-version-update;com.azure.spring:azure-spring-boot-starter-keyvault-secrets;current} -->
+      <version>3.2.0-beta.1</version> <!-- {x-version-update;com.azure.spring:azure-spring-boot-starter-keyvault-secrets;current} -->
     </dependency>
     <dependency>
       <groupId>com.azure.spring</groupId>