Update actions/checkout digest to a5ac7e5 (#456)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/build.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: windows-2022
     steps:
       - name: Get the sources
-        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
       - name: Fetch all tags and branches
         run: git fetch --prune --unshallow
       - name: Install .NET
@@ -34,7 +34,7 @@ jobs:
     runs-on: windows-2019
     steps:
       - name: Get the sources
-        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
       - name: Install required tools
         run: npm install -g markdownlint-cli
         shell: powershell