tests.importCargoLock.gitDependencyWorkspaceInheritance: fix build

Regressed in f80228a805.

This shouldn't happen again unless we change the order that keys are
inserted (like we did here), as tomli-w respects the sort order of its
input.

(cherry picked from commit 0d25674d1d)

pkgs/build-support/rust/test/import-cargo-lock/git-dependency-workspace-inheritance/want.toml

@@ -12,8 +12,8 @@ keywords = [
 bar = "1.0.0"
 
 [dependencies.foo]
+version = "1.0.0"
 features = [
     "cat",
     "meow",
 ]
-version = "1.0.0"