chore: tweak a few more global git settings

[codebytere]

From my latest Windows sync:

NORTHAMERICA+cavohr@CODEBYTERE-WIN-WORK CLANGARM64 ~/Developer/electron-gn/src/electron (main)
$ e sync -vvvv -f
Running "gclient sync --with_branch_heads --with_tags -vv -vvvv -f" in C:\Users\cavohr\Developer\electron-gn\src
Updating depot_tools...
WARNING:root:depot_tools recommends setting the following for
optimal Chromium development:

$ git config --global core.fscache true
$ git config --global core.preloadindex true

You can silence this message by setting these recommended values.

You can allow depot_tools to automatically update your global
Git config to recommended settings by running:
$ git config --global depot-tools.allowGlobalGitConfig true

To suppress this warning and silence future recommendations, run:
$ git config --global depot-tools.allowGlobalGitConfig false

[dsanders11]

LGTM. I pushed a commit to update the CI workflow for Windows, since we throw an error in maybeAutoFix in CI, so it was failing on Windows until that was updated.