fix: ssh algo

Author: gene-redpanda

.tasks/tools.yml

@@ -6,7 +6,7 @@ tasks:
     cmds:
       - |
         if [ ! -f artifacts/testkey ]; then
-          printf 'y\n' | ssh-keygen -t rsa -b 4096 -C "{{.SSH_EMAIL}}" -N "" -f artifacts/testkey && chmod 0700 artifacts/testkey
+          printf 'y\n' | ssh-keygen -t ed25519 -C "{{.SSH_EMAIL}}" -N "" -f artifacts/testkey && chmod 0700 artifacts/testkey
         else
           echo "artifacts/testkey already exists. Skipping key generation."
         fi