github: Use actions/checkout@v4

Signed-off-by: Alexey Gladkov <legion@altlinux.org>

.github/workflows/lint.yml

@@ -10,7 +10,7 @@ jobs:
   lint-shell:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: "install tools"
         run: sudo apt-get -y -qq install shellcheck
       - name: "shellcheck"
@@ -19,7 +19,7 @@ jobs:
   check-docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: "install tools"
         run: sudo apt-get -y -qq install scdoc
       - name: "make docs"
@@ -28,7 +28,7 @@ jobs:
   check-commits:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: "Developer's Certificate of Origin"
@@ -54,7 +54,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [ lint-shell ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: "install tools"
         run: sudo apt-get -y -qq install dash
       - name: "unittests"
@@ -64,7 +64,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [ lint-shell ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: "install tools"
         run: sudo apt-get -y -qq install bash
       - name: "unittests"
@@ -74,7 +74,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [ lint-shell ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: "install tools"
         run: sudo apt-get -y -qq install mksh
       - name: "unittests"