Add period at end of "Enabled system assigned identity" message (#4520)

* Initial plan for issue

* Add period to end of system assigned identity message

Co-authored-by: nturinski <5290572+nturinski@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: nturinski <5290572+nturinski@users.noreply.github.com>

Author: Copilot

src/commands/identity/EnableSystemIdentityStep.ts

@@ -24,7 +24,7 @@ export class EnableSystemIdentityAssignStep extends AzureWizardExecuteStep<Manag
         site.rawSite.identity = identity;
 
         const enabling: string = localize('enabling', 'Enabling system assigned identity for "{0}"...', site.fullName);
-        const enabled: string = localize('enabled', 'Enabled system assigned identity for "{0}"', site.fullName);
+        const enabled: string = localize('enabled', 'Enabled system assigned identity for "{0}".', site.fullName);
         ext.outputChannel.appendLog(enabling);
 
         await client.webApps.update(site.resourceGroup, site.siteName, site.rawSite);