Fix formatting

README.md

@@ -50,7 +50,7 @@ https://user-images.githubusercontent.com/5759207/190852259-c6746172-05c4-4918-8
 https://user-images.githubusercontent.com/5759207/190852270-7aed2db9-dc08-4a9f-8775-07b745657ca1.mp4
 
 # How to use: 📢
-As a package:
+## As a package:
 1. Install using command:
 ```
 pip install git+https://github.com/robinhad/ukrainian-tts.git
@@ -64,7 +64,7 @@ with open("test.wav", mode="wb") as file:
     tts.tts("Привіт", Voices.Olena.value, StressOption.Model.value, file)
 ```
 
-Run manually:  
+## Run manually:  
 `Caution: this won't use normalizer and autostress like a web demo. ` 
 1. `pip install -r requirements.txt`.
 2. Download `model.pth` and `speakers.pth` from "Releases" tab.