fix: Fix check for download permissions

This has been broken since it was refactored in
208ff80, although it seems that the
method was not used anywhere (not even when it was refactored).

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

Author: danxuliu

apps/files_sharing/src/models/Share.ts

@@ -422,7 +422,7 @@ export default class Share {
 		const hasDisabledDownload = (attribute) => {
 			return attribute.scope === 'permissions' && attribute.key === 'download' && attribute.value === false
 		}
-		return this.attributes.some(hasDisabledDownload)
+		return !this.attributes.some(hasDisabledDownload)
 	}
 
 	/**