chore(deps): bump actions/download-artifact from 5 to 6

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

---
updated-dependencies:
- dependency-name: actions/download-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/publish-extension.yaml

@@ -67,7 +67,7 @@ jobs:
       - name: Install vsce
         run: npm install -g @vscode/vsce
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: extension-${{ inputs.version }}
 
@@ -93,7 +93,7 @@ jobs:
       - name: Install ovsx
         run: npm install -g ovsx
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: extension-${{ inputs.version }}
 
@@ -111,7 +111,7 @@ jobs:
     needs: setup
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: extension-${{ inputs.version }}