corrected nuspec

Author: dobriyanchik

src/ChaosSoft.GeneticAlgorithm/ChaosSoft.GeneticAlgorithm.nuspec

@@ -28,7 +28,7 @@
   </metadata>
   <files>
     <file src="..\..\README.md" target="docs\" />
-    <file src="..\..\THIRD-PARTY-NOTICES.txt" target="docs\" />
+    <file src="..\..\THIRD-PARTY-NOTICES.txt" target="content\" />
     <file src="..\..\icon.png" target="images\" />
     <file src="bin\Release\netstandard2.0\chaossoft.geneticalgorithm.dll" target="lib\netstandard2.0" />
     <file src="bin\Release\netstandard2.0\chaossoft.geneticalgorithm.xml" target="lib\netstandard2.0" />