Bump vsce from 2.6.3 to 2.6.4 (#3787)

Bumps [vsce](https://github.com/Microsoft/vsce) from 2.6.3 to 2.6.4.
- [Release notes](https://github.com/Microsoft/vsce/releases)
- [Commits](microsoft/vscode-vsce@v2.6.3...v2.6.4)

---
updated-dependencies:
- dependency-name: vsce
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -70,7 +70,7 @@
     "sinon": "~12.0.1",
     "tslint": "~6.1.3",
     "typescript": "~4.5.5",
-    "vsce": "~2.6.3"
+    "vsce": "~2.6.4"
   },
   "extensionDependencies": [
     "vscode.powershell"