Added BTC payment

Author: ztc1997

DONATE.md

@@ -4,4 +4,7 @@ My PayPal link: [PayPal.Me/ztc1997](https://paypal.me/ztc1997)
 
 ## AliPay
 
-![AliPay](./art/alipay.jpg)
+![AliPay](./art/alipay.jpg)
+
+## BTC
+Address: [1E6BBHUBNJsY8uTFY4cSfm7ffKRx1AjyHy](https://blockchain.info/address/1E6BBHUBNJsY8uTFY4cSfm7ffKRx1AjyHy)

README.md

@@ -15,7 +15,7 @@ On MIUI, go to `Settings`→`Battery & performance`→`Manager apps battery usag
 
 ## Donate
 
-If you like Actinium and want to support the developer of this repo, consider buying me a cup of coffee.  
+If you like Actinium and want to support the developer of this repo, consider buying me a cup of coffee.
 [Donate](./DONATE.md)
 
 ## License