Updated changelog

CHANGELOG.md

@@ -12,12 +12,13 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 - Average document length now uses tokens instead of characters
 - Changes to `*/descriptive_stats.json`: 
-  - Object no longer includes revision. 
+  - The object no longer includes revision. 
   - Now include character-level metrics along with minimum and maximum length. Removed average document length as it is computable from existing metrics.
-- Removed per dataset histograms from main readme. The goal is to avoid loading in the entire dataset when updating the readme. This should make it easier to contributors.
+- Removed per-dataset histograms from the main readme. The goal is to avoid loading the entire dataset when updating the readme. This should make it easier for contributors.
+- Simplifying PR workflow in `contributing.md`
 
 ### CI
-- Fixes bug causing `make update-descriptive-stats` to fails when not having a linear commit history. The script now no longer skips a dataset update based revision, but simply based on whether the `descriptive_stats.json` exists. To ensure that the main readme is always up to date we change the make command to always update it.
+- Fixes bug causing `make update-descriptive-stats` to fail when not having a linear commit history. The script now skips a dataset update based on revision, but only if the `descriptive_stats.json` file does not exist. To ensure that the main readme is always up to date, we change the make command always to update it.
 
 ## [v1.2.8] - 2025-08-05