fix: Update README to include Prerelease input for GitHub module version

Author: MariusStorhaug

README.md

@@ -40,7 +40,7 @@ The Initialize-PSModule action will prepare the runner for the PSModule framewor
 | `Verbose` | Enable verbose output. | `false` | `'false'` |
 | `Version` | Specifies the version of the GitHub module to be installed. The value must be an exact version. | `false` | |
 | `Prerelease` | Allow prerelease versions if available. | `false` | `'false'` |
-| `WorkingDirectory` | The working directory where the script runs. | `false`    | `${{ github.workspace }}` |
+| `WorkingDirectory` | The working directory where the script runs. | `false` | `${{ github.workspace }}` |
 
 ## Example