📝 update documentation

doc/mkdocs/docs/home/exceptions.md

@@ -279,6 +279,16 @@ The parsing of the corresponding BSON record type is not implemented (yet).
     [json.exception.parse_error.114] parse error at byte 5: Unsupported BSON record type 0xFF
     ```
 
+### json.exception.parse_error.115
+
+A UBJSON high-precision number could not be parsed.
+
+!!! failure "Example message"
+
+    ```
+    [json.exception.parse_error.115] parse error at byte 5: syntax error while parsing UBJSON high-precision number: invalid number text: 1A
+    ```
+
 ## Iterator errors
 
 This exception is thrown if iterators passed to a library function do not match
@@ -765,6 +775,10 @@ UBJSON and BSON only support integer numbers up to 9223372036854775807.
     number overflow serializing '9223372036854775808'
     ```
 
+!!! note
+
+    Since version 3.9.0, integer numbers beyond int64 are serialized as high-precision UBJSON numbers, and this exception does not further occur. 
+
 ### json.exception.out_of_range.408
 
 The size (following `#`) of an UBJSON array or object exceeds the maximal capacity.