ci: bump actions/upload-artifact from 4 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...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/ci.yml

@@ -91,7 +91,7 @@ jobs:
       - uses: astral-sh/setup-uv@v6
       - run: uv build
       - run: uvx twine check --strict dist/*
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: dist
           path: dist/

.github/workflows/release.yml

@@ -54,7 +54,7 @@ jobs:
           SETUPTOOLS_SCM_PRETEND_VERSION: ${{ needs.version.outputs.version }}
         run: uv build
       - run: uvx twine check --strict dist/*
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: dist
           path: dist/

.github/workflows/sync-spec.yml

@@ -47,7 +47,7 @@ jobs:
           uv run pyright
           uv run pytest -m "not live"
       - run: git diff > sync.patch
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: sync-patch
           path: sync.patch