Update Java Worker Version to 2.9.0

Author: AzureFunctionsJava

pom.xml

@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.microsoft.azure.functions</groupId>
   <artifactId>azure-functions-java-worker</artifactId>
-  <version>2.8.1</version>
+  <version>2.9.0</version>
   <packaging>jar</packaging>
   <parent>
     <groupId>com.microsoft.maven</groupId>