Fixed pipeline build issue

Author: charansai143

azure-pipelines.yml

@@ -11,20 +11,20 @@ jobs:
     BuildPlatform: 'any cpu'
   steps:
   - task: NuGetToolInstaller@1
-    displayName: Install NuGet 5.5.0
+    displayName: Install NuGet 5.5.1
     inputs:
-      versionSpec: '5.5.0'
+      versionSpec: '5.5.1'
       checkLatest: true
   - task: UseDotNet@2
-    displayName: Use .NET Core 3.1.x
+    displayName: Use .NET Core 6.0.x
     inputs:
       packageType: 'sdk'
-      version: '3.1.x'
-  - task: NuGetCommand@2
+      version: '6.0.x'
+  - task: DotNetCoreCLI@2
     displayName: Restore Packages (AppInsights.EnterpriseTelemetry.sln)
     inputs:
       command: 'restore'
-      restoreSolution: 'src/AppInsights.EnterpriseTelemetry.sln'
+      projects: 'src/AppInsights.EnterpriseTelemetry.sln'
       feedsToUse: 'select'
   - task: DotNetCoreCLI@2
     displayName: Build Library Projects