build(deps): 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](https://github.com/actions/upload-artifact/compare/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>

.github/workflows/build.yml

@@ -167,7 +167,7 @@ jobs:
       -
         name: Upload test reports
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: test-reports-${{ env.TESTREPORTS_NAME }}
           path: ./bin/testreports
@@ -245,7 +245,7 @@ jobs:
       -
         name: Upload test reports
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: test-reports-${{ env.TESTREPORTS_NAME }}
           path: ${{ env.TESTREPORTS_BASEDIR }}
@@ -412,7 +412,7 @@ jobs:
           find . -type f -exec file -e ascii -- {} +
       -
         name: Upload release binaries
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: release
           path: ${{ env.DESTDIR }}/*

.github/workflows/docs-upstream.yml

@@ -58,7 +58,7 @@ jobs:
           DOCS_FORMATS: yaml
       -
         name: Upload reference YAML docs
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: docs-yaml
           path: /tmp/buildx-docs/out/reference

.github/workflows/e2e.yml

@@ -57,7 +57,7 @@ jobs:
           mv ${{ env.DESTDIR }}/build/buildx ${{ env.DESTDIR }}/build/docker-buildx
       -
         name: Upload artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: binary
           path: ${{ env.DESTDIR }}/build