ci: use actions/checkout@v4

Now that this Action uses node.js 20, it's time to update the
actions we use for our CI jobs, to also use node.js 20.

actions/github-script does not support node.js 20 yet, though. [1]

[1] actions/github-script#421

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/npm-run-package.yml

@@ -17,7 +17,7 @@ jobs:
     if: github.event_name == 'workflow_dispatch' || github.event.repository.owner.login == 'git-for-windows'
     environment: git-for-windows-ci-push
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           repository: ${{ github.event.repository.full_name }}
           ref: ${{ inputs.branch }}${{ github.event.ref }}

.github/workflows/release-tag.yml

@@ -13,7 +13,7 @@ jobs:
     name: Publish GitHub Release from tag
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           token: ${{ secrets.PUSH_RELEASE_TRAINS_PAT }}
           fetch-depth: 0

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
   build: # make sure build/ci work properly
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: npm ci
       - run: npm run build
       - run: npm run lint
@@ -36,7 +36,7 @@ jobs:
   test: # make sure the action works on a clean machine without building
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Run this Action in-place
         uses: ./
         with:
@@ -49,8 +49,8 @@ jobs:
   test-strip-prefix: # make sure the action works on a clean machine without building
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
+      - uses: actions/checkout@v4
         with:
           repository: microsoft/vcpkg
           path: compat/vcbuild/vcpkg