README.md in prophet-rb-0.5.1 vs README.md in prophet-rb-0.5.2

@@ -8,11 +8,11 @@
 - Linear and non-linear growth
 - Holidays and special events
 
 And gracefully handles missing data
 
-[![Build Status](https://github.com/ankane/prophet-ruby/workflows/build/badge.svg?branch=master)](https://github.com/ankane/prophet-ruby/actions)
+[![Build Status](https://github.com/ankane/prophet-ruby/actions/workflows/build.yml/badge.svg)](https://github.com/ankane/prophet-ruby/actions)
 
 ## Installation
 
 Add this line to your application’s Gemfile:
 
@@ -451,18 +451,9 @@
 ```
 
 ## Resources
 
 - [Forecasting at Scale](https://peerj.com/preprints/3190.pdf)
-
-## Upgrading
-
-### 0.2.0
-
-Prophet now uses [Rover](https://github.com/ankane/rover) instead of Daru. Two changes you may need to make are:
-
-- `Rover.read_csv` instead of `Daru::DataFrame.from_csv`
-- `df[["ds", "yhat"]]` instead of `df["ds", "yhat"]`
 
 ## Credits
 
 This library was ported from the [Prophet Python library](https://github.com/facebook/prophet) and is available under the same license.