Bump SNI to 6.0.1 in nuspec (#3104)

Author: mdaigle

tools/specs/Microsoft.Data.SqlClient.nuspec

@@ -29,7 +29,7 @@ When using NuGet 3.x this package requires at least version 3.4.</description>
     <tags>sqlclient microsoft.data.sqlclient</tags>
     <dependencies>
       <group targetFramework="net462">
-        <dependency id="Microsoft.Data.SqlClient.SNI" version="6.0.0-preview1.24226.4" />
+        <dependency id="Microsoft.Data.SqlClient.SNI" version="6.0.1" />
         <dependency id="Azure.Identity" version="1.11.4" />
         <dependency id="Microsoft.Extensions.Caching.Memory" version="8.0.1" exclude="Compile" />
         <dependency id="Microsoft.IdentityModel.JsonWebTokens" version="7.5.0" />
@@ -42,7 +42,7 @@ When using NuGet 3.x this package requires at least version 3.4.</description>
         <dependency id="Microsoft.Bcl.Cryptography" version="8.0.0"/>
       </group>
       <group targetFramework="net8.0">
-        <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="6.0.0-preview1.24226.4" exclude="Compile" />
+        <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="6.0.1" 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.IdentityModel.JsonWebTokens" version="7.5.0" />
@@ -53,7 +53,7 @@ When using NuGet 3.x this package requires at least version 3.4.</description>
         <dependency id="Microsoft.Bcl.Cryptography" version="8.0.0"/>
       </group>
       <group targetFramework="net9.0">
-        <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="6.0.0-preview1.24226.4" exclude="Compile" />
+        <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="6.0.1" exclude="Compile" />
         <dependency id="Azure.Identity" version="1.11.4" />
         <dependency id="Microsoft.Extensions.Caching.Memory" version="9.0.0" exclude="Compile" />
         <dependency id="Microsoft.IdentityModel.JsonWebTokens" version="7.5.0" />