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/build-and-test.yml

@@ -52,7 +52,7 @@ jobs:
         target_arch: ["linux-64"]
     steps:
       - name: Download installer
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: installer-${{ matrix.target_arch }}
       - name: Generate environment.yaml
@@ -79,7 +79,7 @@ jobs:
           cache: true
           environments: release
       - name: Download artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           path: artifacts
       - name: Create release notes
@@ -123,7 +123,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Download installer
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: ${{ matrix.installer }}
       - name: Run tests
@@ -141,7 +141,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Download installer
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: installer-osx-64
       - name: Run tests
@@ -163,7 +163,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Download installer
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: installer-osx-arm64
       - name: Run tests
@@ -190,7 +190,7 @@ jobs:
         with:
           python-version: '3.14'
       - name: Download installer
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: installer-linux-64
       - name: Prepare environment