Update 3.10.0 release notes to emphasize some changed behavior

Daffodil 3.10.0 fixed some bugs that may require small updates to some
schemas that had been relying on incorrect behavior. This commit
emphasizes these changes in the release notes.

site/_releases/3.10.0.md

@@ -68,7 +68,6 @@ compilation time dropping from more than 2 minutes to under 20 seconds.
 * {% jira 2962 %} Complex nillable leads to Expression Evaluation Error: Element does not have a value.
 * {% jira 2965 %} Improve Schema Compiler performance
 * {% jira 533 %} TDML Runner: More user-friendly error if expected infoset provided is empty
-* {% jira 1042 %} Date and Time Strict Parsing is not very strict
 * {% jira 2362 %} JSON output should not quote all values unnecessarily
 * {% jira 2773 %} Expression .[intexpr] should create warning
 * {% jira 2797 %} Make Runner final
@@ -104,11 +103,18 @@ compilation time dropping from more than 2 minutes to under 20 seconds.
 * {% jira 2896 %} validationMode=full enables Daffodils limited validation
 
   Full Validation no longer performs limited validation in addition to Xerces validation. It now only performs Xerces validation.
+  This has resulted in some changes to error messages that are reported during validation, which may require updates to any tests
+  that are expecting validation error messages that are specific to the limited validation process.
 
 * {% jira 2773 %} Expression .[intexpr] should create warning
 
   Removed the text "subset" from the "Indexing is only allowed on arrays" Schema Definition Error message.
 
+* {% jira 1042 %} Date and Time Strict Parsing is not very strict
+
+  Daffodil had been parsing xs:date/time leniently regardless of what dfdl:calendarCheckPolicy had been set to. This change may
+  require some changes to schemas that were reliant on this faulty behavior and may need to set dfdl:calendarCheckPolicy="lax".
+
 ### Dependency Changes
 
 The following dependencies have been added or updated: