fix: use correct sdk name in apple sdk readme

Author: ChiragAgg5k

templates/swift/README.md.twig

@@ -27,7 +27,7 @@
 
 The Appwrite Swift SDK is available via Swift Package Manager. In order to use the Appwrite Swift SDK from Xcode, select File > **Add Packages**
 
-In the dialog that appears, enter the Appwrite Swift SDK [package URL]({{ sdk.gitRepo }}) in the search field. Once found, select `sdk-for-swift`.
+In the dialog that appears, enter the Appwrite Swift SDK [package URL]({{ sdk.gitRepo }}) in the search field. Once found, select `sdk-for-{{ sdk.name }}`.
 
 On the right, select your version rules and ensure your desired target is selected in the **Add to Project** field.