Fix typo in nuspec

Author: josesimoes

nanoFramework.Logging.Stream.nuspec

@@ -25,7 +25,7 @@ There is also a package with the Serial Logger only and another with the basic D
     <dependencies>
       <dependency id="nanoFramework.CoreLibrary" version="1.10.3-preview.7" />
       <dependency id="nanoFramework.System.Text" version="1.1.1-preview.35" />
-      <dependency id="anoFramework.System.IO.FileSystem" version="1.0.0-preview.30" />
+      <dependency id="nanoFramework.System.IO.FileSystem" version="1.0.0-preview.30" />
     </dependencies>
   </metadata>
   <files>