chore: update workflows config.

Author: jaywcjlove

.github/workflows/build_ios_app.yml

@@ -1,6 +1,9 @@
 name: iOS
 on: [push, pull_request]
 
+env:
+  SKIP_PREFLIGHT_CHECK: true
+
 # https://github.com/uiwjs/react-native-uiw/issues/156
 jobs:
   build:

.github/workflows/ci.yml

@@ -3,6 +3,10 @@ on:
   push:
     branches:
       - master
+
+env:
+  SKIP_PREFLIGHT_CHECK: true
+
 jobs:
   build-deploy:
     runs-on: ubuntu-18.04

.github/workflows/pull_request.yml

@@ -2,6 +2,9 @@ name: Pull Request Build
 on:
   pull_request:
 
+env:
+  SKIP_PREFLIGHT_CHECK: true
+
 jobs:
   build-deploy:
     runs-on: ubuntu-20.04