fix: export-key task

Author: fredleger

images/codespace-like/src/config/user/.config/mise/tasks/gnupg/export-key

@@ -6,7 +6,6 @@
 set -e -o pipefail
 
 username="${usage_username?}"
-filename="$(echo "$username" | tr " " "_" | tr "[:upper:]" "[:lower:]").asc"
 
 mkdir -p .gpg-keys
-gpg --export --armor "${username}" >.gpg-keys/"${filename}"
+gpg --export --armor "${username}"