After this I am facing issue like how to configure pipeline to achieve my requirement.
In order to Deploy your Logic app files in Azure Portal, You can Use ARM Template Deployment Task in your Release pipeline and select your LogicApp.json file which has your Logic app workflow and LogicApp.parameters.json file which has your Logic app parameters like below:-

Select your LogicApp.json and LogicApp.parameters.json file by clicking on ... 3 dots and correct path to your repository. And In override parameter write the name of your existing Logic app and its location in the value like below:-
Override Template parameter:-
-logicAppName valleyLA87 -logicAppLocation australiaeast

Output:-



Updated:-
My Azure Repository:-

I have selected the above LogicApp.json from my Repository in my template section of Release pipeline ARM Template Deployment Task and LogicApp.parameters.json in my Template parameter section.
I recommend using Release pipeline and not CI Build pipeline But you can make use of below YAML code in your build pipeline too -
trigger:
- master
pool:
vmImage: ubuntu-latest
steps:
- script: echo Hello, world!
displayName: 'Run a one-line script'
- task: AzureResourceManagerTemplateDeployment@3
displayName: 'ARM Template deployment: Resource Group scope'
inputs:
azureResourceManagerConnection: 'SID subscription(xxxxx6e97cb2a7)'
subscriptionId: 'xxxxx-e2b6e97cb2a7'
resourceGroupName: siliconrg54
location: 'Australia East'
csmFile: '$(System.DefaultWorkingDirectory)/_AzureResourceGroup5/AzureResourceGroup5/LogicApp.json'
csmParametersFile: '$(System.DefaultWorkingDirectory)/_AzureResourceGroup5/AzureResourceGroup5/LogicApp.parameters.json'
overrideParameters: '-logicAppName valleyLA87 -logicAppLocation australiaeast'