typo fix (#400)

Author: damienbod

2-WebApp-graph-user/2-1-Call-MSGraph/README.md

@@ -287,5 +287,5 @@ HTML table displaying the properties of the *me* object as returned by Microsoft
 
 ## Learn more
 
-- Learn how [Microsoft.Identity.Web](../../Microsoft.Identity.Web) works, in particular hooks-up to the ASP.NET Core ODIC events
+- Learn how [Microsoft.Identity.Web](../../Microsoft.Identity.Web) works, in particular hooks-up to the ASP.NET Core OIDC events
 - [Use HttpClientFactory to implement resilient HTTP requests](https://docs.microsoft.com/en-us/dotnet/standard/microservices-architecture/implement-resilient-applications/use-httpclientfactory-to-implement-resilient-http-requests) used by the Graph custom service