fix: add python_version to the lock rule

Author: aignas

python/uv/private/lock.bzl

@@ -182,6 +182,9 @@ modifications and the locking is not done from scratch.
             doc = "Public, see the docs in the macro.",
             default = True,
         ),
+        "python_version": attr.string(
+            doc = "Public, see the docs in the macro.",
+        ),
         "srcs": attr.label_list(
             mandatory = True,
             allow_files = True,
@@ -364,6 +367,7 @@ def lock(
         env = env,
         existing_output = maybe_out,
         generate_hashes = generate_hashes,
+        python_version = python_version,
         srcs = srcs,
         strip_extras = strip_extras,
         target_compatible_with = target_compatible_with,