Update doc/whatsnew.rst

Per review of #214

Co-authored-by: Fridolin Glatter <[email protected]>

doc/whatsnew.rst

@@ -12,7 +12,7 @@ v2024.8.6
 - Add :doc:`/transport/index` (:pull:`207`, :pull:`208`, :issue:`210`, :pull:`212`).
 - Add :doc:`/project/edits` project code and documentation (:pull:`204`).
 - Reduce log verbosity of :func:`.apply_spec` (:pull:`202`).
-- Fixes and updates to :doc:`/api/tools-costs` (:pull:`186`, :pull:`187`, :pull:`190`, :pull:`195`).
+- Fix and update :doc:`/api/tools-costs` (:pull:`186`, :pull:`187`, :pull:`190`, :pull:`195`).
 
   - Fix jumps in cost projections for technologies with first technology year that's after than the first model year (:pull:`186`).
   - Change the use of base_year to mean the year to start modeling cost changes (:pull:`186`).