Update tutorial-containerize-deploy-python-web-app-azure-01.md

Updates documentation to reflect the rebranding of Azure CosmosDB for MongoDB to Azure DocumentDB, announced at Ignite 2025. Changes Replace references to "Azure CosmosDB for MongoDB" with "Azure DocumentDB" Update service names, links, and related terminology throughout the documentation Context At Ignite 2025, Microsoft announced the rebranding of Azure CosmosDB for MongoDB to Azure DocumentDB. This PR ensures our documentation is aligned with the new branding. Reference: https://learn.microsoft.com/en-us/azure/documentdb/