fixing NuGet pcakage's icon

Author: salaros

src/WakaTime.csproj

@@ -21,7 +21,7 @@
         <Company>CodeCave, PUE</Company>
         <Owners>salaros,CodeCave</Owners>
         <Copyright>Copyright 2016 (c) CodeCave, PUE</Copyright>
-        <PackageIconUrl>https://github.com/CodeCavePro/wakatime-sharp/blob/master/content/wakatime-120.png</PackageIconUrl>
+        <PackageIconUrl>https://raw.githubusercontent.com/CodeCavePro/wakatime-sharp/master/content/wakatime-120.png</PackageIconUrl>
         <PackageLicenseUrl>https://github.com/CodeCavePro/wakatime-sharp/blob/master/LICENSE.txt</PackageLicenseUrl>
         <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
         <PackageProjectUrl>https://github.com/CodeCavePro/wakatime-sharp</PackageProjectUrl>