docs(readme): install stable package version with pip (#531)

mxschmitt · web-flow · commit 9b5bd50c5077 · 2021-02-25T10:37:54.000-08:00
diff --git a/README.md b/README.md
@@ -29,7 +29,7 @@ Headless execution is supported for all browsers on all platforms.
 ## Usage
 
 ```sh
-pip install playwright==1.8.0a1
+pip install playwright
 playwright install
 ```
 
