remove version string from displayName

Author: Bertk

eng/azure-pipelines-nightly.yml

@@ -5,7 +5,7 @@ steps:
 - task: UseDotNet@2
   inputs:
     useGlobalJson: true
-  displayName: Install .NET Core SDK 8.0.411
+  displayName: Install .NET Core SDK (global.json)
 
 - task: NuGetAuthenticate@1
   displayName: Authenticate with NuGet feeds

eng/build.yml

@@ -2,7 +2,7 @@ steps:
 - task: UseDotNet@2
   inputs:
     useGlobalJson: true
-  displayName: Install .NET Core SDK 8.0.411
+  displayName: Install .NET Core SDK (global.json)
 
 # create artifact/package folder
 - pwsh: |