doc: fix legacy vs current path for modules

Author: jknack

docs/src/main/java/io/jooby/adoc/DocGenerator.java

@@ -46,7 +46,7 @@ public static void generate(Path basedir, boolean publish, boolean v1, boolean d
     String version = version();
     // 2.x/3.x/main
     var branch = new Git("jooby-project", "jooby", Paths.get(System.getProperty("user.dir"))).currentBranch();
-    var uiVersion = branch.equals("main") ? "" : "/v" + branch.replace(".x", "");
+    var uiVersion = branch.endsWith(".x") ? "/v" + branch.replace(".x", "") : "";
 
     Path asciidoc = basedir.resolve("asciidoc");