Update c-cpp.yml

Author: pyama86

.github/workflows/c-cpp.yml

@@ -6,17 +6,16 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+    - uses: actions/checkout@v4 # v4
     - name: Cache assets
-      uses: actions/cache@ab5e6d0c87105b4c9c2047343972218f562e4319 # v4
+      uses: actions/cache@v4 # v4
       with:
         # npm cache files are stored in `~/.npm` on Linux/macOS
         path: tmp
         key: ${{ runner.os }}-build-${{ hashFiles('Makefile') }}
         restore-keys: |
           ${{ runner.os }}-build-
           ${{ runner.os }}-
-    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
     - name: test
       run: make test_on_docker
       env: