update sample for spring boot 2.1.0. (#316)

Signed-off-by: Pan Li <panli@microsoft.com>

samplecode/example/pom.xml

@@ -20,7 +20,7 @@
 		<dependency>
 			<groupId>com.microsoft.azure</groupId>
 			<artifactId>spring-data-cosmosdb</artifactId>
-			<version>2.0.5</version>
+			<version>2.1.0</version>
 		</dependency>
 
 		<dependency>

samplecode/pom.xml

@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.0.0.RELEASE</version>
+		<version>2.1.0.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>