fix: correct YAML syntax in notification stages

- Separate echo arguments for proper variable expansion
- Fix 'when' clause indentation (remove extra dash)
- Resolves: cannot unmarshal map into string error

.woodpecker.yml

@@ -331,20 +331,20 @@ pipeline:
     image: alpine:latest
     commands:
       - echo "🎉 Pipeline completed successfully!"
-      - echo "Branch: ${CI_COMMIT_BRANCH}"
-      - echo "Commit: ${CI_COMMIT_SHA:0:8}"
-      - echo "Image: hub.peikarband.ir/peikarband/landing:${CI_COMMIT_SHA:0:8}"
+      - echo "Branch:" "${CI_COMMIT_BRANCH}"
+      - echo "Commit:" "${CI_COMMIT_SHA:0:8}"
+      - echo "Image:" "hub.peikarband.ir/peikarband/landing:${CI_COMMIT_SHA:0:8}"
     when:
-      - event: [push, tag]
+      event: [push, tag]
       status: success
 
   notify-failure:
     image: alpine:latest
     commands:
       - echo "❌ Pipeline failed!"
-      - echo "Branch: ${CI_COMMIT_BRANCH}"
-      - echo "Commit: ${CI_COMMIT_SHA:0:8}"
+      - echo "Branch:" "${CI_COMMIT_BRANCH}"
+      - echo "Commit:" "${CI_COMMIT_SHA:0:8}"
       - echo "Please check the logs above"
     when:
-      - event: [push, tag]
+      event: [push, tag]
       status: failure