update build script

appveyor.yml

@@ -23,7 +23,7 @@ install:
 build_script:
   - mvn clean install -DskipTests
   - ps: mkdir .pkg
-  - ps: Get-ChildItem -Path .\azure-functions-java-worker\target\* -Include 'azure*' -Exclude '*shaded.jar' | %{ Copy-Item $_.FullName .\.pkg\azure-functions-java-worker.jar }
+  - ps: Get-ChildItem -Path .\target\* -Include 'azure*' -Exclude '*shaded.jar' | %{ Copy-Item $_.FullName .\.pkg\azure-functions-java-worker.jar }
   - ps: nuget pack ./tools/AzureFunctionsJavaWorker.nuspec -Properties versionsuffix=$env:APPVEYOR_BUILD_NUMBER
 
 artifacts: