update CI with yaml anchor

.woodpecker/deploy-rsync.yaml

@@ -2,6 +2,9 @@ when:
   - event: push
     branch: [main, staging] 
 
+variables:
+  - &SSH_PORT "2003"
+
 steps:
   build:
     image: golang:1.22-bookworm
@@ -22,7 +25,7 @@ steps:
       - RSYNC_TARGET_USER
     environment:
       - TARGET_PATH=/webroot/adora.codes
-      - RSYNC_TARGET_PORT=2003
+      - *SSH_PORT
     commands:
       - apk add --update --no-cache openssh rsync git
       - mkdir -p $HOME/.ssh
@@ -41,7 +44,7 @@ steps:
       - RSYNC_TARGET_USER
     environment:
       - TARGET_PATH=/webroot/www-staging.adora.codes
-      - RSYNC_TARGET_PORT=2003
+      - *SSH_PORT
     commands:
       - apk add --update --no-cache openssh rsync git
       - mkdir -p $HOME/.ssh