libgit2: update to 0.26.1.
libgit2: update to 0.26.1.

Closes: #12269 [via git-merge-pr]

necrophcodr/void-packages,NeoChontrix/void-packages,coredumb/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,coredumb/void-packages,coredumb/void-packages,NeoChontrix/void-packages,coredumb/void-packages,coredumb/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,coredumb/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages