Use latest in URL instead of specific version

Author: slozier

README.md

@@ -12,7 +12,7 @@ IronPython 3 targets Python 3, including the re-organized standard library, Unic
 | **What?** | **Where?** |
 | --------: | :------------: |
 | **Windows/Linux/macOS Builds** | [![Build status](https://dotnet.visualstudio.com/IronLanguages/_apis/build/status/ironpython3)](https://dotnet.visualstudio.com/IronLanguages/_build/latest?definitionId=43) [![Github build status](https://github.com/IronLanguages/ironpython3/workflows/CI/badge.svg)](https://github.com/IronLanguages/ironpython3/actions?workflow=CI) |
-| **Downloads** | [![NuGet](https://img.shields.io/nuget/vpre/IronPython.svg)](https://www.nuget.org/packages/IronPython/3.4.2) [![Release](https://img.shields.io/github/release/IronLanguages/ironpython3.svg?include_prereleases)](https://github.com/IronLanguages/ironpython3/releases/latest)|
+| **Downloads** | [![NuGet](https://img.shields.io/nuget/vpre/IronPython.svg)](https://www.nuget.org/packages/IronPython/latest) [![Release](https://img.shields.io/github/release/IronLanguages/ironpython3.svg?include_prereleases)](https://github.com/IronLanguages/ironpython3/releases/latest)|
 | **Help** | [![Gitter chat](https://badges.gitter.im/IronLanguages/ironpython.svg)](https://gitter.im/IronLanguages/ironpython) [![StackExchange](https://img.shields.io/badge/stack%20overflow-ironpython-informational?logo=stack-overflow&logoColor=white)](https://stackoverflow.com/questions/tagged/ironpython) |
 
 
@@ -89,7 +89,7 @@ See the [Package compatibility](https://github.com/IronLanguages/ironpython3/wik
 
 ## Installation
 
-Binaries of IronPython 3 can be downloaded from the [release page](https://github.com/IronLanguages/ironpython3/releases/latest), available in various formats: `.msi`, `.zip`, `.deb`, `.pkg`. The IronPython package is also available on [NuGet](https://www.nuget.org/packages/IronPython/3.4.2). See the [installation document](https://github.com/IronLanguages/ironpython3/wiki/Installing) for detailed instructions on how to install a standalone IronPython interpreter on various operating systems and .NET frameworks.
+Binaries of IronPython 3 can be downloaded from the [release page](https://github.com/IronLanguages/ironpython3/releases/latest), available in various formats: `.msi`, `.zip`, `.deb`, `.pkg`. The IronPython package is also available on [NuGet](https://www.nuget.org/packages/IronPython/latest). See the [installation document](https://github.com/IronLanguages/ironpython3/wiki/Installing) for detailed instructions on how to install a standalone IronPython interpreter on various operating systems and .NET frameworks.
 
 ### PowerShell