ci: run test only on PR and not on main (#60)

Author: saikrishna321

.github/workflows/main.yml

@@ -1,10 +1,5 @@
 on:
-   push:
-      branches:
-         - main
-   pull_request:
-      branches:
-         - main
+  pull_request:
 
 name: Appium Flutter Integration Driver
 jobs:

.github/workflows/test.yml

@@ -1,10 +1,5 @@
 on:
-   push:
-      branches:
-         - main
-   pull_request:
-      branches:
-         - main
+  pull_request:
 
 name: Tests