Highlight the install command in README.md (#2088)

Author: jiriurban21

README.md

@@ -50,8 +50,17 @@ Install-Module -Name PowerShellGet -Force
 Exit
 ```
 
-After installing `PowerShellGet`, you can simply run `Install-Module PSReadLine -AllowPrerelease -Force` to get the latest prerelease version of `PSReadLine`.
-If you only want to get the latest stable version, run `Install-Module PSReadLine`.
+After installing `PowerShellGet`, you can get the latest prerelease version of `PSReadLine` by running
+
+```powershell
+Install-Module PSReadLine -AllowPrerelease -Force
+```
+
+If you only want to get the latest stable version, run:
+
+```powershell
+Install-Module PSReadLine
+```
 
 >[!NOTE] Prerelease versions will have newer features and bug fixes, but may also introduce new issues.