Add changelog entry.

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+Changed: The SUNDIALS::KINSOL, SUNDIALS::ARKode, and SUNDIALS::IDA
+interfaces used to use callbacks through which users provide
+information to these solvers. If user code encountered errors, this
+was indicated via integer return codes -- a zero return value
+indicating success.
+
+This is not in line with how C++ typically operates; in C++ errors are
+typically indicated via exceptions. The interfaces to the libraries
+above have been changed to now use exceptions instead, and this
+convention has been documented in a glossary entry on
+@ref GlossUserProvidedCallBack "user provided callback".
+<br>
+(Wolfgang Bangerth, 2023/05/31)