Update README.md

Author: navidcy

README.md

@@ -4,18 +4,18 @@ Oceananigans.jl comes above the ocean's surface...
 
 ### Instructions
 
-First [install Julia](https://julialang.org/downloads/).
+First [install Julia](https://julialang.org/downloads/); suggested version 1.10. See [juliaup](https://github.com/JuliaLang/juliaup) README for how to install 1.10 and make that version the default.
 
 Then clone this repository
 
 ```bash
-$ git clone [email protected]:navidcy/AquaSkyLES.jl.git
+git clone [email protected]:navidcy/AquaSkyLES.jl.git
 ```
 
 Open Julia from within the local directory of the repo via:
 
 ```bash
-$ julia --project
+julia --project
 ```
 
 The first time, you need to install any dependencies: