[manylinux2014] Update git from 2.26.0 to 2.26.2
[manylinux2014] Update git from 2.26.0 to 2.26.2

https://raw.githubusercontent.com/git/git/master/Documentation/RelNotes/2.26.2.txt
https://raw.githubusercontent.com/git/git/master/Documentation/RelNotes/2.26.1.txt

pypa/manylinux,pypa/manylinux,manylinux/manylinux,pypa/manylinux,manylinux/manylinux