Update dependency gitdb to v4.0.9

This MR contains the following updates:

Package	Update	Change
gitdb	patch	==4.0.5 -> ==4.0.9

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Release Notes

gitpython-developers/gitdb

v4.0.9

Compare Source

v4.0.8

Compare Source

v4.0.7

Compare Source

v4.0.6

Compare Source

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