[third_party][jinja2] update to 3.1.2 from chromium

Bug: 126798
Bug: b/278346287

Change-Id: I99df9d6bcff48504ccf5000b8e278aa9d309de79
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/jinja2/+/851956
Reviewed-by: Casey Dahlin <sadmac@google.com>
40 files changed