misc: fix template bullseye gpg key.

helpers/make-anna

helpers/make-apt-setup

helpers/make-base-installer

helpers/make-brltty

helpers/make-cdebconf-entropy

helpers/make-cdrom-checker

helpers/make-cdrom-detect

helpers/make-cdrom-retriever

helpers/make-choose-mirror

helpers/make-clock-setup

helpers/make-debian-installer

helpers/make-debian-installer-utils

helpers/make-efi-reader

helpers/make-electrum

helpers/make-enblend-enfuse

helpers/make-finish-install

helpers/make-grub-installer

helpers/make-hugin

helpers/make-hw-detect

helpers/make-installation-locale