add conditions

.woodpecker/demo.yml

@@ -1,4 +1,10 @@
 ---
+when:
+  - event: [pull_request, tag]
+  - event: [push, manual]
+    branch:
+      - ${CI_REPO_DEFAULT_BRANCH}
+
 steps:
   demo:
     image: "alpine"

.woodpecker/test.yml

@@ -1,4 +1,10 @@
 ---
+when:
+  - event: [pull_request, tag]
+  - event: [push, manual]
+    branch:
+      - ${CI_REPO_DEFAULT_BRANCH}
+
 steps:
   test_1:
     image: "alpine"