[tagpr] update CHANGELOG.md

Author: github-actions[bot]

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## [v0.7.3](https://github.com/yuuki/tcpulse/compare/v0.7.2...v0.7.3) - 2025-06-08
+- refactor: replace cobra subcommands with pflag/viper flags by @yuuki in https://github.com/yuuki/tcpulse/pull/28
+
 ## [v0.7.2](https://github.com/yuuki/tcpulse/compare/v0.7.1...v0.7.2) - 2025-06-08
 - Add JSON Lines output format for measurement results by @yuuki in https://github.com/yuuki/tcpulse/pull/25
 - refactor: rename project from connperf to tcpulse by @yuuki in https://github.com/yuuki/tcpulse/pull/26