[dev doc] add new right-click feature (1f9264) to changelog

CHANGELOG.md

@@ -24,6 +24,7 @@
 - [tsv] add unnamed columns if extra cells in rows
 - [diff] now based on display value (more intuitive)
 - [mouse] move to column also
+- [mouse] right-click to rename-col, rename-sheet, or edit-cell
 - [cosmetic] addcol-new (`za`) input new column name on top of new column
 - [cosmetic] include file iteration in progress meter
 - [xls xlsx] use options.header to determine column names