Previously, the `docs.md` guide was appearing under "OTHER" in search results and the results for the `/start*` tutorial pages were appearing under "START". This commit changes this so that `docs.md` appears under "GUIDES" and `/start*` appear under "TUTORIALS", since that is where they belong conceptually. It also changes the header of the guides search-area from "GUIDE" to "GUIDES" and that of tutorials from "TUTORIAL" to "TUTORIALS". Before: ![search-results areas before][1] After: ![search-results areas after][2] [1]: https://user-images.githubusercontent.com/8604205/107811568-0ce80480-6d77-11eb-8652-e7a947c36e63.png [2]: https://user-images.githubusercontent.com/8604205/107811569-0eb1c800-6d77-11eb-9a69-0000a3703c8a.png PR Close #40881