Bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/main.yaml

@@ -75,7 +75,7 @@ jobs:
       - run: npx @vscode/vsce package
       - run: echo "VSIX_PATH=$(find . -maxdepth 1 -type f -iname "*.vsix" | head -1)" >> $GITHUB_ENV
       - run: echo "VSIX_NAME=$(basename $(find . -maxdepth 1 -type f -iname "*.vsix" | head -1))" >> $GITHUB_ENV
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           path: ${{ env.VSIX_PATH }}
           name: ${{ env.VSIX_NAME }}