Update NEWS and UPGRADING with addition of JSON error locations

Author: bukka

NEWS

@@ -23,6 +23,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-20426 (Spoofchecker::setRestrictionLevel() error message
     suggests missing constants). (DanielEScherzer)
 
+- JSON:
+  . Enriched JSON last error / exception message with error location.
+    (Juan Morales)
+
 - Fibers:
   . Fixed bug GH-20483 (ASAN stack overflow with fiber.stack_size INI
     small value). (David Carlier)

UPGRADING

@@ -40,6 +40,10 @@ PHP 8.6 UPGRADE NOTES
     IntlNumberRangeFormatter::IDENTITY_FALLBACK_RANGE identity fallbacks.
     It is supported from icu 63.
 
+- JSON:
+  . Added extra info about error location to the JSON error messages returned
+    from json_last_error_msg() and JsonException message.
+
 - Phar:
   . Overriding the getMTime() and getPathname() methods of SplFileInfo now
     influences the result of the phar buildFrom family of functions.