Updates the RELEASE.txt note

release_docs/RELEASE.txt

@@ -414,21 +414,19 @@ New Features
 
     Library:
     --------
-    - H5Gcreate1() now rejects size_hint parameters larger than UINT32_MAX
+    - H5Gcreate1() now handles large size_hint parameters correctly
 
-      The size_hint value is ultimately stored in a uint32_t struct field,
-      so specifying a value larger than this on a 64-bit field can cause
-      undefined behavior including crashing the system.
+      On 64-bit systems, large values of the size_t size_hint parameter
+      would be passed through a uint32_t struct field, causing a crash
+      on 64-bit Windows w/ MSVC and probably incorrect behavior or crashes
+      on other 64-bit systems.
 
       The documentation for this API call was also incorrect, stating that
       passing a negative value would cause the library to use a default
       value. Instead, passing a "negative" value actually passes a very large
       value, which is probably not what the user intends and can cause
       crashes on 64-bit systems.
-
-      The Doxygen documentation has been updated and passing values larger
-      than UINT32_MAX for size_hint will now produce a normal HDF5 error.
-
+
         (DER - 2021/04/29, HDFFV-11241)