clarify libraries

README.md

@@ -94,7 +94,7 @@ Several folders contain optional materials as a bonus for interested readers:
 
 - **Setup**
   - [Python Setup Tips](setup/01_optional-python-setup-preferences)
-  - [Installing Libraries Used In This Book](setup/02_installing-python-libraries)
+  - [Installing Python Packages and Libraries Used In This Book](setup/02_installing-python-libraries)
   - [Docker Environment Setup Guide](setup/03_optional-docker-environment)
 - **Chapter 2:**
   - [Comparing Various Byte Pair Encoding (BPE) Implementations](ch02/02_bonus_bytepair-encoder)

setup/02_installing-python-libraries/README.md

@@ -1,4 +1,4 @@
-# Installing Libraries Used In This Book
+# Installing Python Packages and Libraries Used In This Book
 
 This document provides more information on double-checking your installed Python version and packages. (Please see the [../01_optional-python-setup-preferences](../01_optional-python-setup-preferences) folder for more information on installing Python and Python packages.)