CI: Bump actions/checkout from v1 to v4

Author: jirutka

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
     env:
       MY_JOB_VAR: 'allons-y!'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Alpine Linux ${{ matrix.alpine }} ${{ matrix.arch }}
         uses: ./
@@ -93,7 +93,7 @@ jobs:
   test-multi:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install latest Alpine Linux x86_64
         uses: ./

README.adoc

@@ -121,7 +121,7 @@ Path to the created Alpine root directory.
 ----
 runs-on: ubuntu-latest
 steps:
-  - uses: actions/checkout@v2
+  - uses: actions/checkout@v4
 
   - name: Setup latest Alpine Linux
     uses: {action-ref}
@@ -234,7 +234,7 @@ strategy:
 env:
   CROSS_SYSROOT: /mnt/alpine-${{ matrix.os-arch }}
 steps:
-  - uses: actions/checkout@v1
+  - uses: actions/checkout@v4
 
   - name: Set up Alpine Linux for ${{ matrix.os-arch }} (target arch)
     id: alpine-target