Update nuget_build_release.yml to prevent character escaping

[kitsumed]

I'm glad to see the workflow worked flawlessly, however I noticed in the logs that during the release file creation the GitHub Action executed commands that did not exist. These commands were text surrounded by ``. This had the consequence of removing them from the release file, which made weird sentences on the NuGet release notes.

But more importantly, this may compromise the build workflow if you accidentally were to include any kind of ill-intended string in your release body. While linux and bash systems are not my zone of confort, I managed to find a way to create that file in a way that should ignore escape characters, or, at least, those surrounded by ``.

[Zeugma440]

Thanks 😄