Bug#1053774: spdlog: need new upstream release 1.12 for catch2 v3

[Drew Parsons]

Source: spdlog
Version: 1:1.10.0+ds-1
Severity: serious
Justification: debci

catch2 v3 was recently uploaded, but breaks spdlog's tests.

spdlog upstream has released v1.12.0 which uses catch2 v3.