Update Azure credentials secret according to the latest changes (#2714)

Author: NataliaIvakina

modules/ROOT/pages/kubernetes/operations/backup-restore.adoc

@@ -101,13 +101,26 @@ kubectl create secret generic awscreds --from-file=credentials=/path/to/your/cre
 
 [.include-with-azure]
 ======
-. Create a credentials file in the following format:
+. Create a credentials file in the following format (before 2025.06):
 +
 [source, properties, role='noheader']
 ----
 AZURE_STORAGE_ACCOUNT_NAME=<your-azure-storage-account-name>
 AZURE_STORAGE_ACCOUNT_KEY=<your-azure-storage-account-key>
 ----
++
+Starting with 2025.06, update your credentials secret as follows:
++
+[source, properties, role='noheader']
+----
+# Azure credentials file
+AZURE_STORAGE_ACCOUNT=<your_account>
+AZURE_STORAGE_KEY=<your_key>
+AZURE_CLIENT_ID=<your_service_principal_id>
+AZURE_CLIENT_SECRET=<your_service_principal_secret>
+AZURE_TENANT_ID=<your_tenant_id>
+----
+
 . Create the secret named `azurecred` via the credentials file:
 +
 [source, shell, role='noheader']