Bump actions/download-artifact from 7 to 8 (#128)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 7 to 8.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v7...v8)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -98,7 +98,7 @@ jobs:
     runs-on: windows-latest
     steps:
       - name: "Download Artefact"
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: "windows-latest"
       - name: "Dotnet NuGet Add Source"
@@ -125,7 +125,7 @@ jobs:
         with:
           user: ${{secrets.NUGET_USER}}
       - name: "Download Artefact"
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: "windows-latest"
       - name: "Dotnet NuGet Push"
@@ -152,7 +152,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Download Documentation Site
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: docfx-site
           path: ./_site