docs: Update package name mentioned in README

Stranger6667 · Stranger6667 · commit 1d3d57add4c1 · 2020-06-23T00:23:23.000+02:00
diff --git a/README.md b/README.md
@@ -49,7 +49,7 @@ Will be turned into this:
 To use it in your project add the following line to your `dependencies` section in project's `Cargo.toml` file:
 
 ```toml
-cssinline = "0.1"
+css-inline = "0.1"
 ```
 
 ## Example:
