Bumps git/ext/gitdb from 335c0f6 to 0a019a2.

• 0a019a2 Merge pull request #135 from mvanhorn/fix/120-empty-read-before-eof
• ed41d2c Apply suggestions from code review
• 81cf3e5 Fix DecompressMemMapReader.read returning b'' before EOF
• 53c94d6 Merge pull request #134 from mvanhorn/fix/replace-codecs-open-issue-128
• 5e74292 fix: replace deprecated codecs.open with built-in open (#128)
• 5c1b303 Merge pull request #133 from gitpython-developers/dependabot/submodules/gitdb...
• af034fc Bump gitdb/ext/smmap from 5ec977a to e4ad410
• 4c63ee6 Merge pull request #131 from gitpython-developers/dependabot/submodules/gitdb...
• 9c98572 Merge pull request #132 from gitpython-developers/dependabot/github_actions/a...
• df9d041 Bump actions/checkout from 5 to 6
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