fix README coverage badge

Author: Gioee

README.md

@@ -1,6 +1,6 @@
 # SQLite Sync
 
-[![sqlite-sync coverage](https://img.shields.io/badge/dynamic/regex?url=https%3A%2F%2Fsqliteai.github.io%2Fsqlite-sync-dev%2F&search=%3Ctd%20class%3D%22headerItem%22%3EFunctions%3A%3C%5C%2Ftd%3E%5Cs*%3Ctd%20class%3D%22headerCovTableEntryHi%22%3E(%5B%5Cd.%5D%2B)%26nbsp%3B%25%3C%5C%2Ftd%3E&replace=%241%25&label=coverage&labelColor=rgb(85%2C%2085%2C%2085)%3B&color=rgb(167%2C%20252%2C%20157)%3B&link=https%3A%2F%2Fsqliteai.github.io%2Fsqlite-sync-dev%2F)](https://sqliteai.github.io/sqlite-sync-dev/)
+[![sqlite-sync coverage](https://img.shields.io/badge/dynamic/regex?url=https%3A%2F%2Fsqliteai.github.io%2Fsqlite-sync-dev%2F&search=Functions%3A%3C%5C%2Ftd%3E%5Cs*%3Ctd%20class%3D%22headerCovTableEntry(?:Hi|Med|Lo)%22%3E(%5B%5Cd.%5D%2B)%26nbsp%3B%25&replace=%241%25&label=coverage&labelColor=rgb(85%2C%2085%2C%2085)%3B&color=rgb(167%2C%20252%2C%20157)%3B&link=https%3A%2F%2Fsqliteai.github.io%2Fsqlite-sync-dev%2F)](https://sqliteai.github.io/sqlite-sync-dev/)
 
 **SQLite Sync** is a multi-platform extension that brings a true **local-first experience** to your applications with minimal effort. It extends standard SQLite tables with built-in support for offline work and automatic synchronization, allowing multiple devices to operate independently—even without a network connection—and seamlessly stay in sync. With SQLite Sync, developers can easily build **distributed, collaborative applications** while continuing to rely on the **simplicity, reliability, and performance of SQLite**.