loader.efi.8/efibootmgr.8: Don't use contradicting term 'EFI BIOS'

Both (U)EFI and BIOS are completely different things, be precise and don't use
them together.

Reviewed by:	imp
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D56329

usr.sbin/efibootmgr/efibootmgr.8

@@ -24,7 +24,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd September 22, 2024
+.Dd April 11, 2026
 .Dt EFIBOOTMGR 8
 .Os
 .Sh NAME
@@ -84,7 +84,7 @@ boot method to be tried once upon the next boot.
 The UEFI standard defines how hosts may control what is used to
 bootstrap the system.
 Each method is encapsulated within a persistent UEFI variable,
-stored by the UEFI BIOS of the form
+stored by the UEFI firmware of the form
 .Cm Boot Ns Em XXXX
 (where XXXX are uppercase hexadecimal digits).
 These variables are numbered, each describing where to load the bootstrap