UPDATE actions checkout branch name

Author: riccardodallavia

.github/workflows/run-tests.yml

@@ -2,9 +2,9 @@ name: run-tests
 
 on:
   push:
-    branches: [master]
+    branches: [main]
   pull_request:
-    branches: [master]
+    branches: [main]
 
 jobs:
   test:

.github/workflows/update-changelog.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v3
         with:
-          ref: master
+          ref: main
 
       - name: Update Changelog
         uses: stefanzweifel/changelog-updater-action@v1
@@ -23,6 +23,6 @@ jobs:
       - name: Commit updated CHANGELOG
         uses: stefanzweifel/git-auto-commit-action@v4
         with:
-          branch: master
+          branch: main
           commit_message: Update CHANGELOG
           file_pattern: CHANGELOG.md