fixup! ci: add new VFS for Git functional tests workflow

Bump actions/checkout v4 to v6, actions/upload-artifact v6 to v7,
actions/download-artifact v4 to v8, and
git-for-windows/setup-git-for-windows-sdk v1 to v2.

All bumps are Node.js 20 to 24 runtime migrations. checkout v6
moves persisted credentials to ``, which is irrelevant
here. upload-artifact v7 and download-artifact v8 are a coupled
pair maintaining the artifact format contract; the new opt-in
`archive: false` parameter is not used. setup-sdk v2 provisions
the same minimal SDK as v1.

Risk: very low.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

.github/workflows/vfs-functional-tests.yml

@@ -22,10 +22,10 @@ jobs:
 
     steps:
       - name: Check out Git's source code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup build tools
-        uses: git-for-windows/setup-git-for-windows-sdk@v1
+        uses: git-for-windows/setup-git-for-windows-sdk@v2
         with:
           architecture: ${{ matrix.architecture }}
 
@@ -79,7 +79,7 @@ jobs:
           make -j5 DESTDIR="$GITHUB_WORKSPACE/MicrosoftGit/payload/${{ matrix.architecture }}" install
 
       - name: Upload Git artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: MicrosoftGit-${{ matrix.architecture }}
           path: MicrosoftGit
@@ -94,13 +94,13 @@ jobs:
 
     steps:
       - name: Download x86_64 build
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: MicrosoftGit-x86_64
           path: MicrosoftGit
 
       - name: Download aarch64 build
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: MicrosoftGit-aarch64
           path: MicrosoftGit
@@ -123,7 +123,7 @@ jobs:
           BATCH
 
       - name: Upload Git artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: MicrosoftGit
           path: MicrosoftGit