Change GCP sample deploy directory to target/deploy

Fixes: #486.
Resolves #487

spring-cloud-function-samples/function-sample-gcp/.gitignore

@@ -1 +0,0 @@
-deploy/

spring-cloud-function-samples/function-sample-gcp/README.adoc

@@ -27,7 +27,7 @@ Package the application.
 mvn package
 ----
 
-You should see the fat jar in the `deploy` directory.
+You should see the fat jar in the `target/deploy` directory.
 
 Make sure that you have the https://cloud.google.com/sdk/install[Cloud SDK CLI] installed.
 
@@ -38,7 +38,7 @@ gcloud alpha functions deploy function-sample-gcp \
 --entry-point org.springframework.cloud.function.adapter.gcloud.FunctionInvoker \
 --runtime java11 \
 --trigger-http \
---source deploy \
+--source target/deploy \
 --memory 512MB
 ----
 

spring-cloud-function-samples/function-sample-gcp/pom.xml

@@ -43,7 +43,7 @@
 						</goals>
 						<configuration>
 							<shadedArtifactAttached>true</shadedArtifactAttached>
-							<outputDirectory>deploy</outputDirectory>
+							<outputDirectory>target/deploy</outputDirectory>
 							<shadedClassifierName>gcp</shadedClassifierName>
 							<transformers>
 								<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">