Complement changelog and news for release

v2.5/toolkit/ChangeLog

-2021-08-21  Public release of the fastNLO_toolkit package version 2.5.0, tag 2826
+2022-07-20  Public release of the fastNLO_toolkit package version 2.5.0, tag 2842
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 2022-07-14  Klaus Rabbertz <klaus.rabbertz@cern.ch>

v2.5/toolkit/NEWS

-Notes for public release of the fastNLO_toolkit package version 2.5.0, tag 2851
+Notes for public release of the fastNLO_toolkit package version 2.5.0, tag 2842
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 This release includes only some minor improvements:
 - Added option for existing Ecms reweighting in fnlo-tk-cppread