Update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/pull_request.yml

@@ -16,7 +16,7 @@ jobs:
     if: "! contains(toJSON(github.event.commits.*.message), '[skip-ci]')"    
     steps:
     - name: Check out code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         ref: ${{github.event.pull_request.head.sha}}
 

.github/workflows/push.yml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
     - name: Check out code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         persist-credentials: false # otherwise, the token used is the GITHUB_TOKEN, instead of your personal token
         fetch-depth: 0 # otherwise, you will fail to push refs to dest repo

.github/workflows/release.yml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0 # See: https://goreleaser.com/ci/actions/