[13.x] Remove non-string headers from NotPwndVerifier

Merged
KY
25d ago
+5-5

I am noticing a ton of deprecation warnings in my app regarding the NotPwnedVerifier where we use implicit bool -> string conversion for the Add-Padding header. Changing this to be a string as per the Guzzle changelog which states:

Deprecated non-string headers request option values, which will be rejected in 8.0

Screenshot 2026-09-21 at 12 35 22

Found no other places in the framework where this is the case.