docs: removed <PackageReleaseNotes> inside .csproj

docs: removed unused CHANGELOG.md file
chore: bumped up version to 4.1.0 stable

Author: SarcasticMoose

CHANGELOG.md

@@ -7,7 +7,7 @@
 
     <PropertyGroup Label="Nuget Info">
         <PackageId>McdaToolkit</PackageId>
-        <Version>4.0.1-rc3</Version>
+        <Version>4.1.0</Version>
         <Authors>Jakub Tokarczyk</Authors>
         <LangVersion>latest</LangVersion>
         <PackageReadmeFile>README.md</PackageReadmeFile>
@@ -16,7 +16,6 @@
         <PackageLicenseExpression>MIT</PackageLicenseExpression>
         <RepositoryUrl>https://github.com/SarcasticMoose/mcda-toolkit</RepositoryUrl>
         <PackageIcon>icon.png</PackageIcon>
-        <PackageReleaseNotes>RC3 hotfix</PackageReleaseNotes>
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
     </PropertyGroup>