[quarkus2] Adjust doc title (#384)

* Adjust doc title (#383)

* Update antora.yml

---------

Co-authored-by: George Gastaldi <[email protected]>

Author: github-actions[bot]

docs/antora.yml

@@ -1,5 +1,5 @@
 name: quarkus-openapi-generator
-title: Quarkus - Openapi Generator
+title: Openapi Generator
 version: dev
 nav:
   - modules/ROOT/nav.adoc