update CRAN comments

Author: larmarange

cran-comments.md

@@ -12,6 +12,9 @@ cf. https://github.com/larmarange/ggstats/actions
 X-CRAN-Comment: Archived on 2023-11-14 as issues were not corrected
       in time.
 
-The problem was due to the presence of a Unicode character in the
-labels of some graphs. This Unicode character has been removed
-and replaced by Latin-1 characters.
+The problem was due to the presence of a Unicode character (≤) in the
+labels of some graphs generated by ggcoef_model().
+This Unicode character has been removed and replaced by Latin-1 characters (<=).
+
+Documentation has been updated: Rd files with missing \value have been
+updated.