fix: update descriptions for least functions

Co-authored-by: Weston Pace <weston.pace@gmail.com>

extensions/functions_comparison.yaml

@@ -218,11 +218,8 @@ scalar_functions:
   -
     name: "least"
     description: >-
-      Returns the smallest value.  The function will return null if any argument evaluates
+      Evaluates each argument and returns the smallest one.  The function will return null if any argument evaluates
       to null.
-
-      String comparison is done in lexicographical ordering, one character at a time, from
-      left to right. Uppercase letters are less than lowercase letters.
     impls:
       - args:
           - value: T
@@ -232,11 +229,8 @@ scalar_functions:
   -
     name: "least_skip_null"
     description: >-
-      Returns the smallest value. The function will return null only if all arguments evaluate
+      Evaluates each argument and returns the smallest one. The function will return null only if all arguments evaluate
       to null.
-
-      String comparison is done in lexicographical ordering, one character at a time, from
-      left to right. Uppercase letters are less than lowercase letters.
     impls:
       - args:
           - value: T