fix(preview): declare Preview version ID getter

Signed-off-by: Josh <josh.t.richards@gmail.com>

Author: joshtrichards

lib/private/Preview/Db/Preview.php

@@ -47,7 +47,8 @@
  * @method string getEtag() Get the etag of the preview.
  * @method void setEtag(string $etag)
  * @method string|null getVersion() Get the version for files_versions_s3
- * @method void setVersionId(string $versionId)
+ * @method string|null getVersionId() Get the ID of the version metadata row.
+ * @method void setVersionId(string $versionId) Set the ID of the version metadata row.
  * @method bool|null getIs() Get the version for files_versions_s3
  * @method bool isEncrypted() Get whether the preview is encrypted. At the moment every preview is unencrypted.
  * @method void setEncrypted(bool $encrypted)