Increase maximum UCX runtime pin to <1.18.0 (#712)

Increase maximum UCX runtime pin to support UCX up to `v1.17.x`, but support `v1.15.0` and above until we gain confidence with newer UCX.

Authors:
  - Peter Andreas Entschev (https://github.com/pentschev)

Approvers:
  - Mike Sarahan (https://github.com/msarahan)
  - James Lamb (https://github.com/jameslamb)
  - Ray Douglass (https://github.com/raydouglass)

URL: #712

conda/recipes/versions.yaml

@@ -15,4 +15,4 @@ numpy_version:
 nvtx_version:
   - '>=0.2.1,<0.3'
 ucx_version:
-  - '>=1.15.0,<1.16.0'
+  - '>=1.15.0,<1.18.0'