Bump @x-govuk/govuk-eleventy-plugin from 6.7.0 to 6.7.1 (#155)

Bumps [@x-govuk/govuk-eleventy-plugin](https://github.com/x-govuk/govuk-eleventy-plugin) from 6.7.0 to 6.7.1.
- [Release notes](https://github.com/x-govuk/govuk-eleventy-plugin/releases)
- [Commits](x-govuk/govuk-eleventy-plugin@v6.7.0...v6.7.1)

---
updated-dependencies:
- dependency-name: "@x-govuk/govuk-eleventy-plugin"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

package-lock.json

@@ -24,7 +24,7 @@
     "@11ty/eleventy": "^3.0.0",
     "@11ty/eleventy-fetch": "^5.0.0",
     "@11ty/eleventy-plugin-rss": "^2.0.0",
-    "@x-govuk/govuk-eleventy-plugin": "^6.6.1"
+    "@x-govuk/govuk-eleventy-plugin": "^6.7.1"
   },
   "devDependencies": {
     "@x-govuk/eslint-config": "^0.0.1",