i want to update to ios 14.5 but when i update it says it can't verify the update, what should i do

See the articles below.

Update your iOS device.        

Get help with over-the-air iOS updates          

Update – Can’t or can’t restore 

Have you tried using iTunes on a computer or Finder if running Catalina or later to do the update?

 Update software on iOS devices in iTunes on Mac

If you see an error when you update or restore your iPhone, iPad, or iPod      

Updating iOS: common issues and solutions

It's no longer possible to install 14.5. Delete it, check for updates again, and update to 14.6.

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