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](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/python-packages.yml

@@ -36,7 +36,7 @@ jobs:
           python -m build --wheel
 
       - name: "Upload artifacts"
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: dist
           path: dist/

.github/workflows/standalone-builds.yml

@@ -30,7 +30,7 @@ jobs:
           ./scripts/linbuild/release-rivalcfg-cli.sh
 
       - name: "Upload Linux tarball"
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: standalone_linux_x86_64
           path: "dist/*.tar.gz"
@@ -61,7 +61,7 @@ jobs:
           ./scripts/macbuild/release-rivalcfg-cli.sh
 
       - name: "Upload macOS DMG"
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: standalone_macos_arm64
           path: "dist/*.dmg"
@@ -92,7 +92,7 @@ jobs:
           .\scripts\winbuild\release-rivalcfg-cli.bat
 
       - name: "Upload Windows Zip"
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: standalone_windows_x86_64
           path: "dist/*.zip"