cleanup workflow triggers

Author: JackStrohm-asana

.github/workflows/build-node-fibers.yml

@@ -6,6 +6,8 @@ on:
     workflows: [Build Node]
     types:
       - completed
+  pull_request:
+    paths: .github/workflows/build-node-fibers.yml
 
 jobs:
   build-fibers:

.github/workflows/build-node-packages.yml

@@ -1,14 +1,13 @@
 name: Build node-packages with prebuilt Node
 
 on:
-  push:
-    branches:
-      - workflows-packages
   workflow_dispatch:
   workflow_run:
     workflows: [Build Node]
     types:
       - completed
+  pull_request:
+    paths: .github/workflows/build-node-packages.yml
 
 jobs:
   build-packages:

.github/workflows/build-node.yml

@@ -1,10 +1,7 @@
 name: Build Node
 
 on:
-  push:
-    branches:
-      - v20.18.3
-      - workflows-for-v20.18.3
+  workflow_dispatch:
   pull_request:
     paths: .github/workflows/build-node.yml