fix: ensure channel data set is wrapped in (#3)

Author: cjbell

src/Api/Objects.php

@@ -173,6 +173,7 @@ public function setChannelData(
         array $body,
         array $headers = []
     ): array {
+        $body = ['data' => $body];
         $url = $this->url('/objects/%s/%s/channel_data/%s', $collection, $objectId, $channelId);
 
         return $this->putRequest($url, $body, $headers);

src/Api/Users.php

@@ -187,6 +187,7 @@ public function getChannelData(string $userId, string $channelId, array $headers
      */
     public function setChannelData(string $userId, string $channelId, array $body, array $headers = []): array
     {
+        $body = ['data' => $body];
         $url = $this->url('/users/%s/channel_data/%s', $userId, $channelId);
 
         return $this->putRequest($url, $body, $headers);