Missing conda dependency spdlog

Trying to run the WalkingModule from the followig pixi env:

```
[workspace]
authors = ["Giovanni Fregonese "]
channels = ["conda-forge", "robotology"]
name = "gazebo_env"
platforms = ["linux-64"]
version = "0.1.0"

[tasks]

[dependencies]
yarp = ">=3.12"
whole-body-estimators = "*"
bipedal-locomotion-framework = "*"
ergocub-software = "*"
walking-controllers = ">=0.9"
gz-sim-yarp-plugins = "*"
```

results in:
```
pixi run WalkingModule
/home/giovannif/gazebo_env/.pixi/envs/default/bin/WalkingModule: error while loading shared libraries: libspdlog.so.1.15: cannot open shared object file: No such file or directory
```

Is `spdlog` a dependency of WalkingControllers?

Trying to `pixi add spdlog` results in an incompatible version since WalkingControllers 0.9 looks for libspdlog 1.15 but other dependecies require spdlog>=1.16, adding `spdlog = ">=1.15.0, <1.16.0"` works and the WalkingModule can run.