fix: Update TCK version to 0.3.0alpha

Author: fjuma

.github/workflows/run-tck.yml

@@ -12,7 +12,7 @@ on:
 
 env:
   # Tag of the TCK
-  TCK_VERSION: v0.3.0
+  TCK_VERSION: 0.3.0alpha
   # Tells uv to not need a venv, and instead use system
   UV_SYSTEM_PYTHON: 1