fix: upgrade @nuxtjs/robots from 2.4.2 to 2.5.0

Snyk has created this PR to upgrade @nuxtjs/robots from 2.4.2 to 2.5.0.

See this package in npm:
https://www.npmjs.com/package/@nuxtjs/robots

See this project in Snyk:
https://app.snyk.io/org/grabarz-and-partner/project/0e938292-21a6-4a22-94aa-3781ee524510?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -73,7 +73,7 @@
     "@fullhuman/postcss-purgecss": "4.0.2",
     "@js-basics/vector": "1.56.10",
     "@nuxtjs/pwa": "3.3.5",
-    "@nuxtjs/robots": "2.4.2",
+    "@nuxtjs/robots": "2.5.0",
     "@nuxtjs/sitemap": "2.4.0",
     "@nuxtjs/storybook": "3.3.1",
     "@storybook/addon-a11y": "6.1.21",