vts-exclude: Correctly exclude failing uwb vts tests

There was a bug in the syntax used in the previous CL.

Bug: 281630896
Test: make vts -j 128 && vts-tradefed run vts --module VtsHalUwbTargetTest
(Ensured that the tests are skipped correctly)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:d8e3ff791d0d05415db27eca34305acac8ed6b9b)
Merged-In: If426fdaa283d7bcd9bf53e9d6accbcfc96375bdd
Change-Id: If426fdaa283d7bcd9bf53e9d6accbcfc96375bdd