Upgrade rust/crates/tinytemplate to 1.2.1 am: a3bdae3ac7 am: 2043cb5371

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tinytemplate/+/1662429

Change-Id: I001336f42889c3d1b62cda7658281e4d349fa535