Build(deps): Bump actions/download-artifact from 4.3.0 to 8.0.1

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4.3.0 to 8.0.1.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](https://github.com/actions/download-artifact/compare/v4.3.0...3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: 8.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/dotnet-build-and-test.yml

@@ -609,7 +609,7 @@ jobs:
           python-version: "3.13"
           os: ${{ runner.os }}
       - name: Download all test results from current run
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           pattern: dotnet-test-results-*
           path: dotnet-test-results/

.github/workflows/python-integration-tests.yml

@@ -506,7 +506,7 @@ jobs:
           python-version: ${{ env.UV_PYTHON }}
           os: ${{ runner.os }}
       - name: Download all test results from current run
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           pattern: test-results-*
           path: test-results/

.github/workflows/python-merge-tests.yml

@@ -687,7 +687,7 @@ jobs:
           python-version: ${{ env.UV_PYTHON }}
           os: ${{ runner.os }}
       - name: Download all test results from current run
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           pattern: test-results-*
           path: test-results/

.github/workflows/python-sample-validation.yml

@@ -693,7 +693,7 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       - name: Download all validation reports
-        uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           pattern: validation-report-*
           path: reports/