Update ci.yml

.github/workflows/ci.yml

@@ -1,14 +1,10 @@
 name: Elixir CI
 
-# Define workflow that runs when changes are pushed to the
-# `main` branch or pushed to a PR branch that targets the `main`
-# branch. Change the branch name if your project uses a
-# different name for the main branch like "master" or "production".
 on:
   push:
-    branches: [ "main" ]  # adapt branch for project
+    branches: [ "master" ]  # adapt branch for project
   pull_request:
-    branches: [ "main" ]  # adapt branch for project
+    branches: [ "master" ]  # adapt branch for project
 
 # Sets the ENV `MIX_ENV` to `test` for running tests
 env: