Adjust github actions to work on main branch instead of master branch

.github/workflows/browsers.yml

@@ -1,7 +1,7 @@
 name: End-to-end tests (playwright)
 on:
   push:
-    branches: [ main, master ]
+    branches: [ main ]
     paths:
       - 'src/**'
       - 'test-e2e/**'

.github/workflows/bundlesize.yml

@@ -2,7 +2,7 @@ name: Bundle size checks
 
 on:
   push:
-    branches: [ main, master ]
+    branches: [ main ]
     paths:
       - '.github/workflows/bundlesize.yml'
       - 'src/scripts/**'

.github/workflows/lint.yml

@@ -2,7 +2,7 @@ name: Code linting
 
 on:
   push:
-    branches: [ main, master ]
+    branches: [ main ]
     paths:
       - '.github/workflows/lint.yml'
       - 'src/scripts/**'

.github/workflows/release-drafter.yml

@@ -2,8 +2,7 @@ name: Release drafter
 
 on:
   push:
-    branches:
-      - master
+    branches: [ main ]
 
 jobs:
   update-draft-release:

.github/workflows/unit-tests.yml

@@ -2,7 +2,7 @@ name: Unit tests
 
 on:
   push:
-    branches: [ main, master ]
+    branches: [ main ]
     paths:
       - '.github/workflows/unit-tests.yml'
       - 'src/scripts/**'