Fixing the capitalization of a code comment

Something about this single character in the code comment being lowercase really bugged me. Updated the comment in the "Authenticate access with system-assigned managed identity" section where the PowerShell code lies. Specifically, updated the s to S (capitalized) on line 311 in the comment.

Author: ian-hank

articles/automation/enable-managed-identity-for-automation.md

@@ -308,7 +308,7 @@ Disable-AzContextAutosave -Scope Process
 # Connect to Azure with system-assigned managed identity
 $AzureContext = (Connect-AzAccount -Identity).context
 
-# set and store context
+# Set and store context
 $AzureContext = Set-AzContext -SubscriptionName $AzureContext.Subscription -DefaultProfile $AzureContext
 ```
 
@@ -435,4 +435,4 @@ Azure Automation provided authentication for managing Azure Resource Manager res
 
 - If you need to disable a managed identity, see [Disable your Azure Automation account managed identity](disable-managed-identity-for-automation.md).
 
-- For an overview of Azure Automation account security, see [Automation account authentication overview](automation-security-overview.md).
+- For an overview of Azure Automation account security, see [Automation account authentication overview](automation-security-overview.md).