chore: readme

README.md

@@ -9,11 +9,12 @@ size_categories:
 ---
 # GIST 1M for lab-1806-vec-db
 
-See <https://github.com/pku-lab-1806-llm/lab-1806-vec-db> (Not public).
+See <https://github.com/pku-lab-1806-llm/lab-1806-vec-db> for more information.
+
+You need to join the organization to access the source code.
 
 This is the GIST 1M in `bin` format that is converted from the original `fvecs`.
 
-Download this and directly move them into `lab-1806-vec-db`.
+Download all the `.toml` in `config/` and put them in the same directory of `lab-1806-vec-db`.
 
-- `.bin` files should be in `data/`
-- `.toml` files should be in `config/`
+Then download any binary file you need in `data/` and put it like above.