Upgrade Azure Pipelines from Node.js 18 to 20 LTS (#53)

* Initial plan

* Update Azure Pipelines to use Node.js 20.x instead of 18.x

Co-authored-by: dkamburov <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: dkamburov <[email protected]>

Author: Copilot

azure-pipelines/igniteui-wc-grid-examples.yml

@@ -36,7 +36,7 @@ stages:
         displayName: 'Install Node'
         inputs:
           versionSource: 'spec'
-          versionSpec: '18.x'
+          versionSpec: '20.x'
 
       - task: Bash@3
         displayName: 'Create download artifact per sample (Shell)'