C#: Downgrade Microsoft.Build nuget package

17.4.0 does not officially support .NET 6 (it supports .NET 7), so downgrade
to avoid warnings.

Author: hvitved

cpp/autobuilder/Semmle.Autobuild.Cpp/Semmle.Autobuild.Cpp.csproj

@@ -17,7 +17,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Build" Version="17.4.0" />
+    <PackageReference Include="Microsoft.Build" Version="17.3.2" />
   </ItemGroup>
 
   <ItemGroup>

csharp/autobuilder/Semmle.Autobuild.CSharp/Semmle.Autobuild.CSharp.csproj

@@ -14,7 +14,7 @@
 		<Folder Include="Properties\" />
 	</ItemGroup>
 	<ItemGroup>
-		<PackageReference Include="Microsoft.Build" Version="17.4.0" />
+		<PackageReference Include="Microsoft.Build" Version="17.3.2" />
 		<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
 	</ItemGroup>
 	<ItemGroup>

csharp/autobuilder/Semmle.Autobuild.Shared/Semmle.Autobuild.Shared.csproj

@@ -11,7 +11,7 @@
 		<Folder Include="Properties\" />
 	</ItemGroup>
 	<ItemGroup>
-		<PackageReference Include="Microsoft.Build" Version="17.4.0" />
+		<PackageReference Include="Microsoft.Build" Version="17.3.2" />
 	</ItemGroup>
 	<ItemGroup>
 		<ProjectReference Include="..\..\extractor\Semmle.Util\Semmle.Util.csproj" />

csharp/extractor/Semmle.Extraction.CSharp.Standalone/Semmle.Extraction.CSharp.Standalone.csproj

@@ -19,7 +19,7 @@
 		<Folder Include="Properties\" />
 	</ItemGroup>
 	<ItemGroup>
-		<PackageReference Include="Microsoft.Build" Version="17.4.0" />
+		<PackageReference Include="Microsoft.Build" Version="17.3.2" />
 		<PackageReference Include="Microsoft.Win32.Primitives" Version="4.3.0" />
 		<PackageReference Include="System.Net.Primitives" Version="4.3.1" />
 		<PackageReference Include="System.Security.Principal" Version="4.3.0" />

csharp/extractor/Semmle.Extraction.CSharp/Semmle.Extraction.CSharp.csproj

@@ -19,6 +19,6 @@
 	</ItemGroup>
 	<ItemGroup>
 		<PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.4.0" />
-		<PackageReference Include="Microsoft.Build" Version="17.4.0" />
+		<PackageReference Include="Microsoft.Build" Version="17.3.2" />
 	</ItemGroup>
 </Project>