fix: update README.md with minor adjustments

Author: dlidstrom

README.md

@@ -7,7 +7,7 @@
 **Updates:**
 
 - 🔥 Support for reporting in json format (thanks [@cgkantidis](https://github.com/cgkantidis)!)
-- 🔥 Performance improvements: it now takes ~9s to process Quake 2 source! (thanks [@cgkantidis](https://github.com/cgkantidis)!)
+- 🔥 [Performance improvements](#71-performance-measurements): it now takes ~9s to process Quake 2 source! (thanks [@cgkantidis](https://github.com/cgkantidis)!)
 - Introducing [duplo-action](https://github.com/dlidstrom/duplo-action) for using Duplo in GitHub Actions!
 - v1.1 improve memory usage (grabbed from [@nachose fork](https://github.com/nachose/Duplo)), also re-enabled tests and organized code
 - 🚀 v1.0 add build on Windows (thanks [@chausner](https://github.com/chausner)!)