Merge pull request #99 from xdev-software/renovate/antora-cli-3.x

Update dependency @antora/cli to v3.1.8

Author: JohannesRabauer

docs/package.json

@@ -3,7 +3,7 @@
     "@antora/lunr-extension": "^1.0.0-alpha.8"
   },
   "devDependencies": {
-    "@antora/cli": "3.1.7",
+    "@antora/cli": "3.1.8",
     "@antora/site-generator": "3.1.8"
   }
 }