dependabot: ignore Spring 6 as it requires Java 17
dependabot: ignore Spring 6 as it requires Java 17

see https://github.com/KorAP/Kustvakt/issues/380#issuecomment-1314411796, see https://github.com/KorAP/Kustvakt/issues/380#issuecomment-1314411796

Change-Id: I0e035b93947d9722ae3a1f52915748a94253acc4

KorAP/Kustvakt,KorAP/Kustvakt,KorAP/Kustvakt,KorAP/Kustvakt