[.] Update readme

Author: aofdev

README.md

@@ -8,5 +8,6 @@
 - [kafka-practice](https://github.com/aofdev/rust-practice/tree/main/kafka)
 - [matching-keyword ⭐️](https://github.com/aofdev/rust-practice/tree/main/matching-keyword)
 - [parser-csv-in-gz](https://github.com/aofdev/rust-practice/tree/main/parser-csv-in-gz)
+- [parser-peg](https://github.com/aofdev/rust-practice/tree/main/parser-peg)
 - [practices](https://github.com/aofdev/rust-practice/tree/main/practices)
 - [rabbitmq-practice](https://github.com/aofdev/rust-practice/tree/main/rabbitmq)