use curl instead of wget

Use curl instead of wget. wget is not installed by default when we deploy VM from marketplace image.
And sudo is not required to get config.

Author: taoyama

articles/virtual-machines/workloads/redhat/redhat-rhui.md

@@ -105,7 +105,7 @@ Use the following procedure to lock a RHEL 8.x VM to a particular minor release.
 1. Get the EUS repository `config` file.
 
    ```bash
-   sudo wget https://rhelimage.blob.core.windows.net/repositories/rhui-microsoft-azure-rhel8-eus.config
+   curl -O https://rhelimage.blob.core.windows.net/repositories/rhui-microsoft-azure-rhel8-eus.config
    ```
 
 1. Add EUS repositories.
@@ -150,7 +150,7 @@ To remove the version lock, use the following commands. Run the commands as `roo
 1. Get the regular repositories `config` file.
 
     ```bash
-    sudo wget https://rhelimage.blob.core.windows.net/repositories/rhui-microsoft-azure-rhel8.config
+    curl -O https://rhelimage.blob.core.windows.net/repositories/rhui-microsoft-azure-rhel8.config
     ```
 
 1. Add non-EUS repository.