ci: run ci on main branch (#162)

* ci: run ci on main branch

* ci: fix deprecated param for codecov-action

Author: inkydragon

.github/workflows/CI.yml

@@ -3,7 +3,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
     tags: '*'
 jobs:
   test:
@@ -27,7 +27,7 @@ jobs:
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v5
         with:
-          file: lcov.info
+          files: lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true