ssh 준비 스크립트 포트 추가

Co-authored-by: Copilot <copilot@github.com>

prepare-ssh/action.yml

@@ -6,6 +6,9 @@ inputs:
     required: true
   host:
     required: true
+  port:
+    required: false
+    default: "22"
   key-path:
     required: false
     default: ~/.ssh/deploy_key
@@ -23,4 +26,4 @@ runs:
         printf '%s\n' "${{ inputs.ssh-key }}" > ${{ inputs.key-path }}
         chmod 600 ${{ inputs.key-path }}
 
-        ssh-keyscan -H "${{ inputs.host }}" >> ~/.ssh/known_hosts
+        ssh-keyscan -p ${{ inputs.port }} -H "${{ inputs.host }}" >> ~/.ssh/known_hosts