Enable RollForward to run on the latest .NET SDKs

Enables installing and running `CycloneDX` on runtimes/SDKs newer than those
that it targets when published. For instance, allows v4.0.0 to run with
.NET SDK 9.0 installed.

Fixes #908

CycloneDX/CycloneDX.csproj

@@ -11,6 +11,9 @@
     <ToolCommandName>dotnet-CycloneDX</ToolCommandName>
     <_SkipUpgradeNetAnalyzersNuGetWarning>true</_SkipUpgradeNetAnalyzersNuGetWarning>
     <TargetFrameworks>net8.0;net7.0;net6.0</TargetFrameworks>
+
+    <!-- Always run on the latest runtime installed. -->
+    <RollForward>Major</RollForward>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(OsEnvironment )'=='windows'">