scripts/installer.sh: use .asc suffix for armored debian gpg key URL.
Fixes
@@ -373,7 +373,7 @@ main() {
$SUDO mkdir -p --mode=0755 /usr/share/keyrings
case "$APT_KEY_TYPE" in
legacy)
- $CURL "https://pkgs.tailscale.com/stable/$OS/$VERSION.gpg" | $SUDO apt-key add -
+ $CURL "https://pkgs.tailscale.com/stable/$OS/$VERSION.asc" | $SUDO apt-key add -
$CURL "https://pkgs.tailscale.com/stable/$OS/$VERSION.list" | $SUDO tee /etc/apt/sources.list.d/tailscale.list
;;
keyring)
