README.md: updated to reflect the latest

It appears the README.md is out dated. Hence, let's update it
to match the current latest data.

This patch updates README.md to reflect the latest status.

Co-authored-by: Shuralyov, Jean <jean.shuralyov@proton.me>
Co-authored-by: Galyna, Cory <cory.galyna@gmail.com>
Co-authored-by: (Holloway) Chew, Kean Ho <me@hollowaykeanho.com>
Signed-off-by: (Holloway) Chew, Kean Ho <me@hollowaykeanho.com>

README.md

@@ -98,7 +98,8 @@ compile cross-platform images whenever possible.
 * [Python Programming Language](https://www.python.org/) (*`srcPYTHON`*)
 * [Rust Programming Language](https://www.rust-lang.org/) (*`srcRUST`*)
 * [LibreOffice](https://www.libreoffice.org/)
-  1. **Writer** - 2-Columns Research Paper PDF Creation (*`srcRESEARCH`*)
+  1. **Writer** - 2-Columns Research PDF Paper (*`srcRESEARCH`*)
+  2. **Writer** - PDF eBOOK (*`srcBOOK`*)
 * Some Manual MISC stuffs