Updated missing README target in all nuspec files used for creating nuget

packages

Author: sacOO7

nuget/io.ably.nuspec

@@ -52,7 +52,7 @@
         <file src="..\src\IO.Ably.NETStandard20\bin\$configuration$\netstandard2.0\IO.Ably.*" target="lib\netstandard2.0" />
         <file src="..\src\IO.Ably.NETStandard20\bin\$configuration$\net6.0\IO.Ably.*" target="lib\net6.0" />
         <file src="..\src\IO.Ably.NETStandard20\bin\$configuration$\net7.0\IO.Ably.*" target="lib\net7.0" />
-        <file src="..\README.md" target="" />
+        <file src="..\README.md" target="README.md" />
         <file src="..\images\logo.png" target="icon.png" />
     </files>
 </package>

nuget/io.ably.push.android.nuspec

@@ -35,7 +35,7 @@
     </metadata>
     <files>
         <file src="..\src\IO.Ably.Push.Android\bin\Package\IO.Ably.Push.*" target="lib\monoandroid" />
-        <file src="..\README.md" target="" />
+        <file src="..\README.md" target="README.md" />
         <file src="..\images\logo.png" target="icon.png" />
     </files>
 </package>

nuget/io.ably.push.ios.nuspec

@@ -26,7 +26,7 @@
     </metadata>
     <files>
         <file src="..\src\IO.Ably.Push.iOS\bin\Package\IO.Ably.Push.*" target="lib\xamarinios" />
-        <file src="..\README.md" target="" />
+        <file src="..\README.md" target="README.md" />
         <file src="..\images\logo.png" target="icon.png" />
     </files>
 </package>