Synchronize versions/packages across nuspec and ref project (#3045)

Add .NET9

Author: MichelZ

tools/specs/Microsoft.Data.SqlClient.nuspec

@@ -44,7 +44,7 @@ When using NuGet 3.x this package requires at least version 3.4.</description>
       <group targetFramework="net8.0">
         <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="6.0.2" exclude="Compile" />
         <dependency id="Azure.Identity" version="1.11.4" />
-        <dependency id="Microsoft.Extensions.Caching.Memory" version="8.0.1" exclude="Compile" />
+        <dependency id="Microsoft.Extensions.Caching.Memory" version="9.0.0" exclude="Compile" />
         <dependency id="Microsoft.IdentityModel.JsonWebTokens" version="7.5.0" />
         <dependency id="Microsoft.IdentityModel.Protocols.OpenIdConnect" version="7.5.0" />
         <dependency id="Microsoft.SqlServer.Server" version="1.0.0"/>