git: update to 2.52.0

[herbygillot]

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[macportsbot]

Notifying maintainers:
@ci42 for port git.

[herbygillot]

@barracuda156 , as per 956465c, the osxkeychain patch is failing for 10.6, in case you'd like to take a look.

[barracuda156]

@herbygillot I think it was failing already at rc2, and this should fix it: https://codeberg.org/macos-powerpc/powerpc-ports/commit/9c5f7463e41cbcde19a436de33e6ab3022e051b9

[herbygillot]

Thank you @barracuda156, committed here: f01d515