arrow

GH-37671: [R] legacy timezone symlinks cause CRAN failures (#37672)

### Rationale for this change

A tzdata update causes our tests to fail on CRAN due to our use of legacy timezones (i.e. starting with "US/") in some of our tests

### What changes are included in this PR?

Update the timezones

### Are these changes tested?

No

### Are there any user-facing changes?

No
* Closes: #37671

Authored-by: Nic Crane <thisisnic@gmail.com>
Signed-off-by: Nic Crane <thisisnic@gmail.com>