Update README

Author: devgianlu

README.md

@@ -1,10 +1,13 @@
 # aria2-android
-[![Build Status](https://travis-ci.com/devgianlu/aria2-android.svg?branch=master)](https://travis-ci.com/devgianlu/aria2-android)
+
+[![Build aria2](https://github.com/devgianlu/aria2-android/actions/workflows/build.yml/badge.svg)](https://github.com/devgianlu/aria2-android/actions/workflows/build.yml)
 
 All you need to cross-compile [aria2](https://github.com/aria2/aria2) for Android.
 
 ## Build
 
-Clone the repository with submodules (`--recurse-submodules`), install the Android NDK r20, set the `ANDROID_NDK_HOME` env variable and run `./build_all.sh`. 
+Clone the repository with submodules (`--recurse-submodules`), install the Android NDK r23, set the `ANDROID_NDK_HOME`
+env variable and run `./build_all.sh`.
 
-This will compile aria2 for `armeavi-v7a`, `arm64-v8a`, `x86` and `x86_64`. The binaries can be found inside the `bin` folder.
+This will compile aria2 for `armeavi-v7a`, `arm64-v8a`, `x86` and `x86_64`. The binaries can be found inside the `bin`
+folder.