Assume codegen renders markdown, not asciidoc (#2664) (#2666)

* Assume codegen renders markdown, not asciidoc

* Drop accidental local dev tweak

(cherry picked from commit afc8333)

Co-authored-by: Josh Mock <joshua.mock@elastic.co>

Author: github-actions[bot]

.buildkite/make.mjs

@@ -109,7 +109,7 @@ async function codegen (args) {
   await $`rm -rf ${join(import.meta.url, '..', 'src', 'api')}`
   await $`mkdir ${join(import.meta.url, '..', 'src', 'api')}`
   await $`cp -R ${join(import.meta.url, '..', '..', 'elastic-client-generator-js', 'output')}/* ${join(import.meta.url, '..', 'src', 'api')}`
-  await $`mv ${join(import.meta.url, '..', 'src', 'api', 'reference.asciidoc')} ${join(import.meta.url, '..', 'docs', 'reference.asciidoc')}`
+  await $`mv ${join(import.meta.url, '..', 'src', 'api', 'reference.md')} ${join(import.meta.url, '..', 'docs', 'reference', 'api-reference.md')}`
   await $`npm run build`
 
   // run docs example generation