Fix conda package_contents test: use files instead of lib glob

The lib glob prepends lib/, but the binary is already at lib/pj_bridge/.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Entire-Checkpoint: 028e940219f6

Author: facontidavide

conda.recipe/recipe.yaml

@@ -47,7 +47,7 @@ requirements:
 
 tests:
   - package_contents:
-      lib:
+      files:
         - lib/pj_bridge/pj_bridge_ros2
 
 about: