Minor editorial changes

Author: jokalode

README.md

@@ -1,6 +1,6 @@
 [![C++ build](https://github.com/glvi/cbor_cpp/actions/workflows/cpp.yaml/badge.svg)](https://github.com/glvi/cbor_cpp/actions/workflows/cpp.yaml)
 # cbor_cpp
-C++ utilities for decoding Concise Binary Object Representation
+C++ library for decoding Concise Binary Object Representation
 
 ## Tested on