Use more descriptive drone secret names

.drone.yml

@@ -107,13 +107,13 @@ steps:
         path: /var/nix/iso-cache
     settings:
       host:
-        from_secret: ssh_host
+        from_secret: iso_web_ssh_host
       user:
-        from_secret: ssh_user
+        from_secret: iso_web_ssh_user
       port:
-        from_secret: ssh_port
+        from_secret: iso_web_ssh_port
       key:
-        from_secret: ssh_key
+        from_secret: iso_web_ssh_key
       target: /srv/os
       source:
         - /var/nix/iso-cache/*.iso
@@ -134,6 +134,6 @@ volumes:
 
 ---
 kind: signature
-hmac: 5d7c0ef5519ffe68189271b18d9084db55c9e14831f95234655f5387f9426db0
+hmac: 2b930bb5fe02006203b7c2fae8af75814749e8cec5f976ec0d6e64eae1b0c5db
 
 ...