Update dependency @graphql-codegen/cli to v1.21.8

Author: renovate-bot

package.json

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "@braid/vue-formulate": "^2.5.3",
-    "@graphql-codegen/cli": "1.21.6",
+    "@graphql-codegen/cli": "1.21.8",
     "@graphql-codegen/fragment-matcher": "2.0.1",
     "@graphql-codegen/introspection": "1.18.2",
     "@nuxt/postcss8": "^1.1.3",