[BUG] bg_space -> brainglobe_space

[alessandrofelder]

Describe the bug
Reported by @Eddymorphling in #83 (comment)

when I run brainmapper -h, I get the below error.

(brainglobe_v2) [ivm@vn2013is10 ~]$ brainmapper -h
Traceback (most recent call last):
  File "/home/ivm/conda/envs/brainglobe_v2/bin/brainmapper", line 5, in <module>
    from brainglobe_workflows.brainmapper.main import main
  File "/home/ivm/conda/envs/brainglobe_v2/lib/python3.10/site-packages/brainglobe_workflows/brainmapper/main.py", line 15, in <module>
    import bg_space as bgs

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Computer used (please complete the following information):

• OS: [e.g. Linux, Windows, macOS] For macOS, please specify if you have an Intel or M1 CPU (M1 is likely if your mac is new).
• Version [e.g. 18.04]
• Hardware specs [e.g. 128 GB RAM, Xeon 4114 CPU].

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[alessandrofelder]

Fixed by @sfmig in #82 - I'll make a release now.