build(deps): bump @scalar/openapi-upgrader from 0.2.3 to 0.2.6

Bumps [@scalar/openapi-upgrader](https://github.com/scalar/scalar/tree/HEAD/packages/openapi-upgrader) from 0.2.3 to 0.2.6.
- [Release notes](https://github.com/scalar/scalar/releases)
- [Changelog](https://github.com/scalar/scalar/blob/main/packages/openapi-upgrader/CHANGELOG.md)
- [Commits](https://github.com/scalar/scalar/commits/HEAD/packages/openapi-upgrader)

---
updated-dependencies:
- dependency-name: "@scalar/openapi-upgrader"
  dependency-version: 0.2.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -20,7 +20,7 @@
   "dependencies": {
     "@apiture/openapi-down-convert": "^0.14.2",
     "@redocly/cli": "^2.20.5",
-    "@scalar/openapi-upgrader": "^0.2.3",
+    "@scalar/openapi-upgrader": "^0.2.6",
     "@stoplight/spectral-parsers": "^1.0.5",
     "@stoplight/spectral-rulesets": "^1.22.0",
     "@stoplight/spectral-runtime": "^1.1.4",