Fix birdnet installation

[shagr4th]

Hi, small fix for an issue I encountered while installing Birdnet-go. If the dietpi-software install command is launched from a protected directory (/root, or whatever), the app installation will fail with the following error:

ERROR [main] Failed to initialize logger error="failed to create base handler: failed to create log directory:
failed to create directory logs: mkdir logs: permission denied"

Likely cause : first birdnet-go execution as the birdnet user create a default config file at the right place, but then try to mkdir a logs directory under the current directory, leading to this permission issue. PR ensures that the birdnet-go first launch is done in the proper user home's directory

[MichaIng]

Let's see: https://github.com/MichaIng/DietPi/actions/runs/21457371422

dietpi-software always navigates to /tmp/DietPi-Software, so it shouldn't matter from where you execute it. So this is likely a faulty (actually consistent, but not great) change in a recent BirdNET-Go pre-release.

[MichaIng]

I aligned the navigation a bit with other install options, where we move to the build dir in a dedicated command and back to the original working dir, transparently. Probably unnecessary bloat, but at least prevents a subshell.

Testing with all architectures: https://github.com/MichaIng/DietPi/actions/runs/21458394596