Small lint fixes: Missing yaml space. Fixed Black's "exclude" config

[koletzilla]

Summary

Related to #501

Fix missing yaml space

--> Running yamllint checks
.github/workflows/test_matrix.yml
  4:5       warning  too few spaces before comment  (comments)

It looks like Black wasn't excluding files from my virtual environment (.venv, the default in PyCharm) even when it's already in the exclude list. The fix makes black correctly process the exclude config.

Executing make check-black before:

((.venv) ) ➜  dbt-clickhouse git:(ClickHouse/small-lint-fixes) ✗ time make check-black
--> Running black checks
All done! ✨ 🍰 ✨
4495 files would be left unchanged.
make check-black  84.35s user 4.75s system 1025% cpu 8.692 total

after:

((.venv) ) ➜  dbt-clickhouse git:(ClickHouse/small-lint-fixes) ✗ time make check-black
--> Running black checks
All done! ✨ 🍰 ✨
85 files would be left unchanged.
make check-black  1.92s user 0.67s system 392% cpu 0.658 total

[Copilot]

Pull Request Overview

This PR addresses two linting configuration issues: fixing a YAML formatting warning and correcting Black's exclude configuration to properly filter files from virtual environments.

• Fixed YAML spacing warning in GitHub workflow file
• Corrected Black's exclude regex pattern by removing trailing pipe character
• Updated Makefile to rely on pyproject.toml exclude configuration instead of command-line override

Reviewed Changes

Copilot reviewed 2 out of 4 changed files in this pull request and generated 1 comment.

File	Description
pyproject.toml	Fixed Black's exclude regex pattern by removing trailing pipe character
Makefile	Removed redundant --exclude parameter to use pyproject.toml configuration

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