Bump actions/download-artifact from 6 to 7

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build-arm64-wheels.yml

@@ -60,7 +60,7 @@ jobs:
     needs: build_wheels
     steps:
     - name: Fetch wheels from previous job
-      uses: actions/download-artifact@v6
+      uses: actions/download-artifact@v7
       with:
         name: wheels
         path: target/wheels/

.github/workflows/build-m1-wheel.yml

@@ -143,7 +143,7 @@ jobs:
         python-version: "3.10"
 
     - name: Download artifacts
-      uses: actions/download-artifact@v6
+      uses: actions/download-artifact@v7
       with:
         name: wheels
         path: ./target/wheels/

.github/workflows/build-test.yml

@@ -269,7 +269,7 @@ jobs:
         python-version: "3.12"
 
     - name: Download artifacts
-      uses: actions/download-artifact@v6
+      uses: actions/download-artifact@v7
       with:
         merge-multiple: true
         pattern: wheels-*-py-3.12