Update azure pipelines (linux)

Author: shaobin

azure-pipelines-linux.yml

@@ -22,20 +22,13 @@ trigger:
     - samples
 
 pool:
-  vmImage: ubuntu-20.04
+  vmImage: ubuntu-22.04
 
 steps:
-- script: sudo apt install g++ cmake libssl-dev
+- script: sudo apt update && sudo apt install -y g++ cmake libssl-dev
   displayName: 'Install g++ cmake libssl-dev'
 
-- script: |
-    wget https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
-    sudo dpkg -i packages-microsoft-prod.deb
-    rm packages-microsoft-prod.deb
-    sudo apt-get update
-    sudo apt-get install -y apt-transport-https
-    sudo apt-get update
-    sudo apt-get install -y dotnet-sdk-6.0
+- script: sudo apt install -y dotnet-sdk-6.0
   displayName: 'Install .NET SDK x64 6.0'
 
 - bash: tools/build.sh