Bump .NET SDK for building (IronLanguages#1986)

Author: slozier

.vsts-ci.yml

@@ -133,20 +133,25 @@ jobs:
 
       # Setup .NET
       - task: UseDotNet@2
-        displayName: Install .NET 6.0 runtime for testing
+        displayName: Install .NET 10.0 SDK for build
+        inputs:
+          packageType: 'sdk'
+          version: '10.0.x'
+      - task: UseDotNet@2
+        displayName: Install .NET 9.0 runtime for testing
         inputs:
           packageType: 'runtime'
-          version: '6.0.x'
+          version: '9.0.x'
       - task: UseDotNet@2
         displayName: Install .NET 8.0 runtime for testing
         inputs:
           packageType: 'runtime'
           version: '8.0.x'
       - task: UseDotNet@2
-        displayName: Install .NET 9.0 SDK for build
+        displayName: Install .NET 6.0 runtime for testing
         inputs:
-          packageType: 'sdk'
-          version: '9.0.x'
+          packageType: 'runtime'
+          version: '6.0.x'
 
       # Build & Test
       - powershell: ./make.ps1