Update README.md

Author: Cadabra

README.md

@@ -1,6 +1,6 @@
 # DateRecurrenceR
 
-[![Release](https://github.com/Cadabra/DateRecurrenceR/actions/workflows/release.yml/badge.svg)](https://github.com/Cadabra/DateRecurrenceR/actions/workflows/release.yml) [![Nuget](https://img.shields.io/nuget/v/DateRecurrenceR?logo=NuGet)](https://www.nuget.org/packages/DateRecurrenceR)
+[![Release](https://github.com/Cadabra/DateRecurrenceR/actions/workflows/release.yml/badge.svg)](https://github.com/Cadabra/DateRecurrenceR/actions/workflows/release.yml) [![Nuget](https://img.shields.io/nuget/v/DateRecurrenceR?logo=NuGet)](https://www.nuget.org/packages/DateRecurrenceR) [![CodeFactor](https://www.codefactor.io/repository/github/cadabra/daterecurrencer/badge/main)](https://www.codefactor.io/repository/github/cadabra/daterecurrencer/overview/main)
 
 ## Efficient Date Recurrence Library for .NET
 
@@ -77,4 +77,4 @@ Install-Package DateRecurrenceR
 
 ```shell
 dotnet add package DateRecurrenceR
-```
+```