Build(deps-dev): Bump cspell from 5.13.1 to 5.15.1 (#2391)

Bumps [cspell](https://github.com/streetsidesoftware/cspell) from 5.13.1 to 5.15.1.
- [Release notes](https://github.com/streetsidesoftware/cspell/releases)
- [Changelog](https://github.com/streetsidesoftware/cspell/blob/main/CHANGELOG.md)
- [Commits](https://github.com/streetsidesoftware/cspell/compare/v5.13.1...v5.15.1)

---
updated-dependencies:
- dependency-name: cspell
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -79,7 +79,7 @@
     "codelyzer": "^6.0.1",
     "commander": "^6.1.0",
     "connect-history-api-fallback": "^1.6.0",
-    "cspell": "^5.13.1",
+    "cspell": "^5.15.1",
     "dotenv": "^8.2.0",
     "dotenv-expand": "^5.1.0",
     "envsub": "^4.0.7",