fix readme

README.md

@@ -18,8 +18,8 @@ This repository also requires that the `vlm-bench` package (`vlbench`) and
 `prismatic-vlms` package (`prisma`) are installed in the current environment.
 These can both be installed from source from the following git repos:
 
-`vlm-bench`: `https://github.com/TRI-ML/vlm-bench`
-`prismatic-vlms`: `https://github.com/TRI-ML/prismatic-vlms`
++ `vlm-bench`: `https://github.com/TRI-ML/vlm-bench`
++ `prismatic-vlms`: `https://github.com/TRI-ML/prismatic-vlms`
 
 ## Usage