Update aspnetcore/fundamentals/configuration/options.md

Author: tdykstra

aspnetcore/fundamentals/configuration/options.md

@@ -17,7 +17,7 @@ when updating this article -->
 
 :::moniker range=">= aspnetcore-7.0"
 
-By [Rick Anderson](https://twitter.com/RickAndMSFT)
+By [Rick Anderson](https://twitter.com/RickAndMSFT).
 
 The options pattern uses classes to provide strongly typed access to groups of related settings. When [configuration settings](xref:fundamentals/configuration/index) are isolated by scenario into separate classes, the app adheres to two important software engineering principles: