pre-commit-hooks: fix conditional dependency on tomli (#200178)

* pre-commit-hooks: fix conditional dependency on tomli

As seen in fc88f3fa49, upstream changed their dependency from `toml` to `tomli>=1.1.0;python_version<"3.11"`.

Without this patch, running `check-toml` from this package fails with:

```
Traceback (most recent call last):
  File "/nix/store/06qpfmlgkhxakgjs8g7gk5jlkczij0m6-python3.10-pre-commit-hooks-4.3.0/bin/.check-toml-wrapped", line 6, in <module>
    from pre_commit_hooks.check_toml import main
  File "/nix/store/06qpfmlgkhxakgjs8g7gk5jlkczij0m6-python3.10-pre-commit-hooks-4.3.0/lib/python3.10/site-packages/pre_commit_hooks/check_toml.py", line 10, in <module>
    import tomli as tomllib
ModuleNotFoundError: No module named 'tomli'
```

See https://github.com/pre-commit/pre-commit-hooks/issues/833.

* pre-commit-hooks: use lib.optionals helper for clarity

Co-authored-by: Fabian Affolter <mail@fabian-affolter.ch>

Co-authored-by: Fabian Affolter <mail@fabian-affolter.ch>

pkgs/development/python-modules/pre-commit-hooks/default.nix

@@ -6,7 +6,7 @@
 , pytestCheckHook
 , pythonOlder
 , ruamel-yaml
-, toml
+, tomli
 }:
 
 buildPythonPackage rec {
@@ -25,7 +25,8 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     ruamel-yaml
-    toml
+  ] ++ lib.optionals (pythonOlder "3.11") [
+    tomli
   ];
 
   checkInputs = [