feat: revert to ed25519

Signed-off-by: kjuulh <contact@kjuulh.io>

.drone.yml

@@ -13,9 +13,9 @@ steps:
         from_secret: gitea_id_ed25519
     commands:
       - mkdir -p $HOME/.ssh/
-      - echo "$SSH_KEY" | base64 -d > $HOME/.ssh/id_rsa
+      - echo "$SSH_KEY" | base64 -d > $HOME/.ssh/id_ed25519
       - ls $HOME/.ssh/
-      - cat $HOME/.ssh/id_rsa
+      - cat $HOME/.ssh/id_ed25519
 
   - name: build
     image: kasperhermansen/cuddle:latest