[readme][easy] Update readme example (#1076)

mikeland73 · web-flow · commit e2c134dec58f · 2023-06-01T13:45:07.000-07:00
## Summary

TSIA

## How was it tested?
diff --git a/README.md b/README.md
@@ -84,15 +84,15 @@ In this quickstart we’ll create a development shell with specific tools instal
 3. Add command-line tools from [Nix Packages](https://search.nixos.org/packages). For example, to add Python 3.10:
 
    ```bash
-   devbox add python310
+   devbox add python@3.10
    ```
 
 4. Your `devbox.json` file keeps track of the packages you've added, it should now look like this:
 
    ```json
    {
       "packages": [
-         "python310"
+         "python@3.10"
        ]
    }
    ```

Original file line number	Diff line number	Diff line change
`@@ -84,15 +84,15 @@ In this quickstart we’ll create a development shell with specific tools instal`
`84`	`84`	`3. Add command-line tools from [Nix Packages](https://search.nixos.org/packages). For example, to add Python 3.10:`
`85`	`85`
`86`	`86`	```bash
`87`		`- devbox add python310`
	`87`	`+ devbox add [email protected]`
`88`	`88`	```
`89`	`89`
`90`	`90`	4. Your `devbox.json` file keeps track of the packages you've added, it should now look like this:
`91`	`91`
`92`	`92`	```json
`93`	`93`	`{`
`94`	`94`	`"packages": [`
`95`		`- "python310"`
	`95`	`+ "[email protected]"`
`96`	`96`	`]`
`97`	`97`	`}`
`98`	`98`	```