Use features branch

Author: dandavison

.github/workflows/ci.yml

@@ -108,9 +108,9 @@ jobs:
 
   # Runs the sdk features repo tests with this repo's current SDK code
   features-tests:
-    uses: temporalio/features/.github/workflows/python.yaml@main
+    uses: temporalio/features/.github/workflows/python.yaml@uv
     with:
       python-repo-path: ${{github.event.pull_request.head.repo.full_name}}
       version: ${{github.event.pull_request.head.ref}}
       version-is-repo-ref: true
-      features-repo-ref: main
+      features-repo-ref: uv