build - Fix distributions task to correctly refer autocomplete task (#7057)

Signed-off-by: Usman Saleem <usman@usmans.info>

build.gradle

@@ -1036,7 +1036,7 @@ distributions {
       from("build/reports/license/license-dependency.html") { into "." }
       from("./docs/GettingStartedBinaries.md") { into "." }
       from("./docs/DocsArchive0.8.0.html") { into "." }
-      from("build/besu.autocomplete.sh") { into "." }
+      from(autocomplete) { into "." }
     }
   }
 }