Change character encoding of all nuspec files to UTF-8

I discovered that the nuspec files were saved in the (in my opinion obsolete) ANSI character encoding. This leads to several problems with special characters. Here is an example: https://chocolatey.org/packages/uTorrent.
Switching to UTF-8 solves this problem, because also the Chocolatey website uses this encoding.
All modern Linux distributions switched to UTF-8 several years ago. But even in Windows 8 when a new plain text file is created, it uses ANSI as character encoding.
I do not understand why Microsoft is still using such outdated and superseded standards like ANSI. That’s a big boo for the Microsoft gods. ;)