Update GitHub Actions workflow

Author: f4ban

.github/workflows/check.yml

@@ -3,9 +3,6 @@ name: check
 on:
   pull_request:
   push:
-    branches:
-      - master
-      - 'releases/*'
 
 jobs:
   check:
@@ -17,7 +14,7 @@ jobs:
           - 28.1
           - snapshot
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v5
     - uses: purcell/setup-emacs@master
       with:
         version: ${{ matrix.emacs_version }}