UCX: add version 1.8.1 (#17972)

Signed-off-by: Howard Pritchard <howardp@lanl.gov>

var/spack/repos/builtin/packages/ucx/package.py

@@ -16,6 +16,7 @@ class Ucx(AutotoolsPackage, CudaPackage):
     maintainers = ['hppritcha']
 
     # Current
+    version('1.8.1', sha256='a48820cb8d0761b5ccf3e7ba03a7c8c1dde6276017657178829e07ffc35b556a')
     version('1.8.0', sha256='e400f7aa5354971c8f5ac6b881dc2846143851df868088c37d432c076445628d')
     version('1.7.0', sha256='6ab81ee187bfd554fe7e549da93a11bfac420df87d99ee61ffab7bb19bdd3371')
     version('1.6.1', sha256='1425648aa03f5fa40e4bc5c4a5a83fe0292e2fe44f6054352fbebbf6d8f342a1')