Bump the pnpm-dependencies group in /npm_and_yarn/helpers with 2 updates

Bumps the pnpm-dependencies group in /npm_and_yarn/helpers with 2 updates: [@pnpm/lockfile-file](https://github.com/pnpm/pnpm) and [@pnpm/dependency-path](https://github.com/pnpm/pnpm).


Updates `@pnpm/lockfile-file` from 8.1.6 to 8.1.8
- [Release notes](https://github.com/pnpm/pnpm/releases)
- [Commits](https://github.com/pnpm/pnpm/commits)

Updates `@pnpm/dependency-path` from 2.1.7 to 2.1.8
- [Release notes](https://github.com/pnpm/pnpm/releases)
- [Commits](https://github.com/pnpm/pnpm/commits)

---
updated-dependencies:
- dependency-name: "@pnpm/lockfile-file"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pnpm-dependencies
- dependency-name: "@pnpm/dependency-path"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pnpm-dependencies
...

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

npm_and_yarn/helpers/package.json

@@ -15,7 +15,7 @@
     "detect-indent": "^6.1.0",
     "nock": "^13.5.1",
     "npm": "6.14.18",
-    "@pnpm/lockfile-file": "^8.1.6",
+    "@pnpm/lockfile-file": "^8.1.8",
     "@pnpm/dependency-path": "^2.1.1",
     "semver": "^7.4.0",
     "patch-package": "^8.0.0"