[BUG] Source tarball builds incorrectly

[petermcd]

Describe the bug
When carrying out a build the source tarball hs a space in it causing it to not be uploaded.

The file is called monzo api-1.2.0.tar.gz

To Reproduce
pip install -e .[build]
python -m build

Expected behavior
file should be called "monzo_api-1.2.0.tar.gz"

Environment (please complete the following information):

• Package Version = 1.2.0
• Python version = python 3.11

Additional context
N/A