(#399) included GitReleaseManager.exe.config in nuget

GitReleaseManager.exe.config contains a AssemblyBinding-redirect
which is needed to use GitReleaseManager.exe.

Author: nils-a

nuspec/nuget/GitReleaseManager.nuspec

@@ -21,6 +21,7 @@
     </metadata>
     <files>
         <file src="..\..\BuildArtifacts\temp\_PublishedApplications\GitReleaseManager.Cli\net472\*.exe" target="tools" />
+        <file src="..\..\BuildArtifacts\temp\_PublishedApplications\GitReleaseManager.Cli\net472\*.exe.config" target="tools" />
         <file src="..\..\BuildArtifacts\temp\_PublishedApplications\GitReleaseManager.Cli\net472\*.xml" target="tools" />
         <file src="..\..\BuildArtifacts\temp\_PublishedApplications\GitReleaseManager.Cli\net472\*.dll" target="tools" exclude="**\Serilog.Sinks.Debug.dll" />
         <file src="..\..\BuildArtifacts\temp\_PublishedApplications\GitReleaseManager.Cli\net472\*.pdb" target="tools" />