Update README.md

Author: rafalkopiec

README.md

@@ -4,7 +4,7 @@ This is a Swift-based decoder for the `.mtsp` container, which is designed to be
 For more information on `.mtsp`, visit [github.com/rafalkopiec/mtsp](https://github.com/rafalkopiec/mtsp).
 
 ### Usage:
-- Add `MTSPDecoder` as an Swift Package Manager dependency `https://github.com/rafalkopiec/mtsp-decoder.git`.
+- Add `MTSPDecoder` as a Swift Package Manager dependency `https://github.com/rafalkopiec/mtsp-decoder.git`.
 - Initialise the `Decoder` class in your data model.
 - Pass in a URL of a metaspace-supported website, such as [https://metaspace.rocks/mtsp](https://metaspace.rocks/mtsp).
 - You will get back an optional `Container` if the download and parsing of the file was successful.