Fix build Makefile and adapt revision

v2.5/toolkit/ChangeLog

-2024-05-05  Public release of the fastNLO_toolkit package version 2.5.1, tag 3020
+2024-05-05  Public release of the fastNLO_toolkit package version 2.5.1, tag 3022
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 2024-05-05  Klaus Rabbertz <klaus.rabbertz@kit.edu>

v2.5/toolkit/NEWS

-Notes for public release of the fastNLO_toolkit package version 2.5.1, tag 3020
+Notes for public release of the fastNLO_toolkit package version 2.5.1, tag 3022
 ===============================================================================
 - Unify x section and uncertainty priint-outs.
 - Respect and modify fastNLO verbosity settings.