Bump actions/upload-artifact from 6 to 7

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

---
updated-dependencies:
- dependency-name: actions/upload-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_pkg.yml

@@ -99,7 +99,7 @@ jobs:
         run: |
           python -m build
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: dist
           path: ./dist/

.github/workflows/docs.yml

@@ -75,7 +75,7 @@ jobs:
       - name: Build docs
         run: sphinx-build -W -n -b html -d build/doctrees doc/src build/html --keep-going -j 2 -D nb_execution_mode=${{ env.nb_execution_mode }}
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         if: |
           always() && (
           startsWith(github.ref, 'refs/tags/') ||

.github/workflows/pytest.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Upload
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: Event File
           path: ${{ github.event_path }}
@@ -101,7 +101,7 @@ jobs:
 
       - name: Upload Test Results
         if: always() && (matrix.py == '3.10') && (matrix.asdf == 4)
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: Unit Test Results
           path: pytest.xml