Has Angular's cache buster hash code format changed?

In Angular 12, if outputHashing=all, it produced hash code as [0-9a-z]{16} format.

like this, main-0123456789abcdef.js

But Angular 18, it produced hash code as [0-9A-Z]{8} format.

like this, main-0123ABCD.js

Is this something wrong with my build environment? I want to confirm if this action is correct.

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