Fix Copilot follow-ups for dotnet pack property contracts

- Align PrepareSqlClientPackNuspec error guidance with direct dotnet pack properties and build.proj aliases

- Update sqlclient-dotnet-pack.md replacement list to use $NuspecVersion$ token

- Correct direct repro command to pass AbstractionsPackageVersion/LoggingPackageVersion and clarify entrypoint property translation

Author: paulmedynski

src/Microsoft.Data.SqlClient/src/Microsoft.Data.SqlClient.csproj

@@ -99,9 +99,9 @@
   <Target Name="PrepareSqlClientPackNuspec"
           BeforeTargets="GenerateNuspec"
           Condition="'$(NuspecFile)' == '$(SqlClientPackNuspecTemplatePath)'">
-      <Error Text="PrepareSqlClientPackNuspec requires AbstractionsPackageVersion. Specify -p:PackageVersionAbstractions=&lt;version&gt;."
+      <Error Text="PrepareSqlClientPackNuspec requires AbstractionsPackageVersion. Specify -p:AbstractionsPackageVersion=&lt;version&gt; (or -p:PackageVersionAbstractions=&lt;version&gt; when invoking build.proj)."
         Condition="'$(AbstractionsPackageVersion)' == ''" />
-      <Error Text="PrepareSqlClientPackNuspec requires LoggingPackageVersion. Specify -p:PackageVersionLogging=&lt;version&gt;."
+      <Error Text="PrepareSqlClientPackNuspec requires LoggingPackageVersion. Specify -p:LoggingPackageVersion=&lt;version&gt; (or -p:PackageVersionLogging=&lt;version&gt; when invoking build.proj)."
         Condition="'$(LoggingPackageVersion)' == ''" />
       <Error Text="PrepareSqlClientPackNuspec requires NuspecVersion. Specify -p:NuspecVersion=&lt;version&gt;."
         Condition="'$(NuspecVersion)' == ''" />

src/Microsoft.Data.SqlClient/src/sqlclient-dotnet-pack.md

@@ -34,7 +34,7 @@ In this flow, SDK pack token substitution is reliable for general nuspec propert
 - Replacements applied:
   - `$AbstractionsPackageVersion$` -> `$(AbstractionsPackageVersion)`
   - `$LoggingPackageVersion$` -> `$(LoggingPackageVersion)`
-  - `<version>1.0.0</version>` -> `<version>$(NuspecVersion)</version>`
+  - `$NuspecVersion$` -> `$(NuspecVersion)`
 
 This keeps layout parity with the existing nuspec while using `dotnet pack` end-to-end.
 
@@ -49,9 +49,11 @@ dotnet pack src/Microsoft.Data.SqlClient/src/Microsoft.Data.SqlClient.csproj --n
 To reproduce this failure in the current branch and exercise the workaround, also pass the required MSBuild properties:
 
 ```bash
-dotnet pack src/Microsoft.Data.SqlClient/src/Microsoft.Data.SqlClient.csproj --no-build -p:Configuration=Debug -p:ReferenceType=Project -p:PackageVersionAbstractions=1.0.0-dev -p:PackageVersionLogging=1.0.0-dev -p:NuspecVersion=7.1.0-preview1-dev -p:PackageOutputPath=<repo>/artifacts/tmp -p:IncludeSymbols=true -p:SymbolPackageFormat=snupkg
+dotnet pack src/Microsoft.Data.SqlClient/src/Microsoft.Data.SqlClient.csproj --no-build -p:Configuration=Debug -p:ReferenceType=Project -p:AbstractionsPackageVersion=1.0.0-dev -p:LoggingPackageVersion=1.0.0-dev -p:NuspecVersion=7.1.0-preview1-dev -p:PackageOutputPath=<repo>/artifacts/tmp -p:IncludeSymbols=true -p:SymbolPackageFormat=snupkg
 ```
 
+Note: `PackageVersionAbstractions` and `PackageVersionLogging` are `build.proj` entrypoint properties and are translated to `AbstractionsPackageVersion` and `LoggingPackageVersion` for direct project pack.
+
 The `PrepareSqlClientPackNuspec` target will materialize the tokens into an intermediate nuspec, bypassing the SDK's substitution bug.
 
 Observed error (without workaround):