Fix: [Actions] nmlc version could not be determined during regression

[glx22]

Regression log is very noisy with each test triggering

fatal: No names found, cannot describe anything.
fatal: No names found, cannot describe anything.
Git checkout found but cannot determine its version. Error:  Command '['git', '-C', '/Users/runner/work/nml/nml', 'describe', '--tags', '--long']' returned non-zero exit status 128.
Git checkout found but cannot determine its version. Error:  Command '['git', '-C', '/Users/runner/work/nml/nml', 'describe', '--tags', '--long']' returned non-zero exit status 128.

Fetch more data during checkout so git describe can do its job.

[LordAro]

Why is this required?

[glx22]

Because with default depth (1), you only get the merge commit, and its relation with last tag is impossible to find