Add badge for managing secrets with Azure Key Vault

Added a new badge for managing secrets with Azure Key Vault, highlighting its importance in securing application configurations.

Author: rmcmurray

learn-pr/achievements.yml

@@ -7900,3 +7900,8 @@ achievements:
   title: Load balance your web service traffic with Application Gateway
   summary: Improve application resilience by distributing load across multiple servers and use path-based routing to direct web traffic.
   iconUrl: /training/achievements/load-balance-web-traffic-with-application-gateway.svg
+- uid: learn.manage-secrets-with-azure-key-vault.badge
+  type: badge
+  title: Manage secrets in your server apps with Azure Key Vault
+  summary: Your application requires service passwords, connection strings, and other secret configuration values to do its job. Storing and handling secret values is risky, and every usage introduces the possibility of leakage. Azure Key Vault, in combination with managed identities for Azure resources, enables your Azure web app to access secret configuration values easily and securely. It does so without needing to store any secrets in your source control or configuration.
+  iconUrl: /training/achievements/manage-secrets-with-azure-key-vault.svg