Update README about site's search functionality (#49475)

Co-authored-by: Peter Bengtsson <peterbe@github.com>

src/search/README.md

@@ -18,7 +18,7 @@ The site search is part of every version of docs.github.com. This endpoint respo
 You can also query our search endpoint directly at:
 `https://docs.github.com/search?version=<VERSION>&language=<LANGUAGE CODE>&filters=topics:<TOPIC>&query=<QUERY>`
 
-- The VERSION can be any numbered GitHub Enterprise Server version (e.g., `2.22`, `3.0`), GitHub AE (`ghae`), or the Free pro team plan (`dotcom`).
+- The VERSION can be any numbered supported GitHub Enterprise Server version (e.g., `3.12`), Enterprise Cloud (`ghec`), or the Free pro team plan (`dotcom`).
 - The LANGUAGE CODE can be one of: `zh`, `es`, `pt`, `ru`, `ja`, `fr`, `de`, `ko`
 - TOPIC can be any topics in [the allowed list of topics](/data/allowed-topics.js). The values in the `topics` attribute are **not** case sensitive, so filtering on `GitHub actions` or `github actions` will return the same result. **Note:** Currently, the topics filter only works for the dotcom version in the English language. We plan to expand this search query to other languages and versions in the future.
 - Any search QUERY you'd like.