Bump libs/spdlog from ffd5aa4 to 2c76e61

Bumps [libs/spdlog](https://github.com/gabime/spdlog) from `ffd5aa4` to `2c76e61`.
- [Release notes](https://github.com/gabime/spdlog/releases)
- [Commits](gabime/spdlog@ffd5aa4...2c76e61)

---
updated-dependencies:
- dependency-name: libs/spdlog
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>