docs: updated bug fixes in release notes

Author: szkiba

releases/v0.7.3.md

@@ -31,6 +31,8 @@ $ ./k6 run -o dashboard script.js
  - [xk6-dashboard no longer works as an extension](https://github.com/grafana/xk6-dashboard/issues/162)
  - [Report charts remain empty with short test](https://github.com/grafana/xk6-dashboard/issues/159)
  - [Increase tooltip text size](https://github.com/grafana/xk6-dashboard/issues/148)
+ - [Selected timeframe resets on next data refresh](https://github.com/grafana/xk6-dashboard/issues/153)
+
 
 ## Enablers