Bump git/ext/gitdb from `3d3e957` to `b653923`

[dependabot[bot]]

Bumps git/ext/gitdb from 3d3e957 to b653923.

Commits

• b653923 Merge pull request #109 from Clavss/fix-issue-101
• 24ecf58 fix #101
• ec58b7e Merge pull request #104 from EliahKagan/cadence
• 3753f72 Merge pull request #103 from EliahKagan/update-readme
• 9302789 Merge pull request #102 from EliahKagan/nopathmod
• e998429 Set Dependabot submodule update cadence to weekly
• dfbfb12 Revise and update the readme
• 965d2d3 Never add a vendored smmap directory to sys.path
• See full diff in compare view

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