ci(deps): Bump actions/download-artifact from 7 to 8

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>

Author: dependabot[bot]

.github/workflows/deploy-bff-api.yml

@@ -162,7 +162,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Download build artifact
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: bff-api-build
           path: ./publish

.github/workflows/deploy-slot-swap.yml

@@ -163,7 +163,7 @@ jobs:
 
     steps:
       - name: Download build artifact
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: api-publish
           path: ./publish

.github/workflows/nightly-quality.yml

@@ -154,7 +154,7 @@ jobs:
             ${{ runner.os }}-nuget-
 
       - name: Download coverage artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: coverage-reports
           path: ./coverage
@@ -342,7 +342,7 @@ jobs:
 
     steps:
       - name: Download all artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           path: ./artifacts
         continue-on-error: true

.github/workflows/sdap-ci.yml

@@ -262,7 +262,7 @@ jobs:
 
     steps:
       - name: Download test results
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         continue-on-error: true
         with:
           name: adr-test-results