Hi,
Does performing the below steps helps:
* Click on the Setting icon.
* Click on General.
* Click on Storage & iCloud usage. It might just say Storage on your device. When the next page pops up you will see at the top the word Storage.
* Under it you will see Manage Storage. Click on it and wait till the list is fully populated. Depending on how many apps you have this can take a couple of seconds to about half a minute.
* Look through this list till you see the new iOS update.
* Delete the update