git: updated to 2.34.1

Git v2.34.1 Release Notes
=========================

This release is primarily to fix a handful of regressions in Git 2.34.

Fixes since v2.34
-----------------

* "git grep" looking in a blob that has non-UTF8 payload was
  completely broken when linked with certain versions of PCREv2
  library in the latest release.

* "git pull" with any strategy when the other side is behind us
  should succeed as it is a no-op, but doesn't.

* An earlier change in 2.34.0 caused JGit application (that abused
  GIT_EDITOR mechanism when invoking "git config") to get stuck with
  a SIGTTOU signal; it has been reverted.

* An earlier change that broke .gitignore matching has been reverted.

* SubmittingPatches document gained a syntactically incorrect mark-up,
  which has been corrected.

(adam)