chore: rename pr ci config file (#4)

Author: iChenLei

.github/workflows/pr-ci.yml renamed to .github/workflows/pr.yml

@@ -1,7 +1,7 @@
 ## @wxml/parser
 
 [![CI Status](https://github.com/wxmlfile/wxml-parser/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/wxmlfile/wxml-parser/actions/workflows/ci.yml?query=branch%3Amain)
-[![PR CI](https://github.com/wxmlfile/wxml-parser/actions/workflows/pr-ci.yml/badge.svg)](https://github.com/wxmlfile/wxml-parser/actions/workflows/pr-ci.yml)
+[![PR CI](https://github.com/wxmlfile/wxml-parser/actions/workflows/pr.yml/badge.svg)](https://github.com/wxmlfile/wxml-parser/actions/workflows/pr.yml)
 [![Twitter Follow Author](https://img.shields.io/twitter/follow/s_chenlei)](https://twitter.com/s_chenlei)
 
 A fast and tolerant wxml parser