Sync uv poetry.lock fixture to v2 format from python ecosystem

Replace old v1 format fixture (using category field) with the v2
format (using groups and files fields) already used in the python
ecosystem. Update spec to use 'click' as the dev sub-dependency
(matching python spec) since 'atomicwrites' is not in the v2 fixture.

This fixes the subdependency_metadata test failure with poetry 2.3.4
which cannot properly parse v1 lockfile format.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: kbukum1

uv/spec/dependabot/uv/file_parser/pyproject_files_parser_spec.rb

@@ -134,7 +134,7 @@
       end
 
       describe "a development sub-dependency" do
-        subject(:dep) { dependencies.find { |d| d.name == "atomicwrites" } }
+        subject(:dep) { dependencies.find { |d| d.name == "click" } }
 
         its(:subdependency_metadata) do
           is_expected.to eq([{ production: false }])