update changelog

CHANGELOG.md

@@ -1,6 +1,17 @@
+## 0.5.0 (2024-10-10)
+
+### API Changes:
+- The NVM secondary cache has been moved to a separate package: https://github.com/Yiling-J/theine-nvm.
+
+### Enhancements:
+- Reduced `Set` allocations, making Theine zero allocation (amortized).
+- Improved read performance slightly by utilizing a cached `now` value.
+- Fixed race conditions in cost (weight) updates that could cause inaccurate policy cost.
+- Added benchmarks for different `GOMAXPROC` values in the README.
+
 ## 0.4.1 (2024-08-22)
 
-Enhancements:
+### Enhancements:
 * Use x/sys/cpu cacheline size by @Yiling-J in https://github.com/Yiling-J/theine-go/pull/43
 * Add Size method on cache by @nlachfr in https://github.com/Yiling-J/theine-go/pull/41
 * Accurate hits/misses counter by @Yiling-J in https://github.com/Yiling-J/theine-go/pull/44