chore: modernize pre-commit hook configuration

The pre-commit config was broken on three fronts:

- `rev: main` / `rev: master` is rejected by modern pre-commit, which
  requires immutable tags (or a SHA) so hook versions are reproducible.
- `gitlab.com/pycqa/flake8` was archived years ago. flake8 now lives at
  `github.com/PyCQA/flake8`.
- `timothycrosley/isort` was renamed to `PyCQA/isort` and the old path
  no longer resolves reliably.

Pin every hook to its current latest release and replace `psf/black` with
`psf/black-pre-commit-mirror`, the upstream-recommended mirror that ships
without black's full dependency tree (faster hook installs).

- pre-commit/pre-commit-hooks → v6.0.0
- PyCQA/isort               → 8.0.1
- psf/black-pre-commit-mirror → 26.3.1
- PyCQA/flake8              → 7.3.0

1 files changed, 7 insertions, 7 deletions

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 367ccf6..17ac56d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -5,20 +5,20 @@
 exclude: '^(\.tox|ci/templates|\.bumpversion\.cfg)(/|$)'
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: main
+    rev: v6.0.0
     hooks:
       - id: trailing-whitespace
       - id: end-of-file-fixer
       - id: debug-statements
-  - repo: https://github.com/timothycrosley/isort
-    rev: main
+  - repo: https://github.com/PyCQA/isort
+    rev: 8.0.1
     hooks:
       - id: isort
-  - repo: https://github.com/psf/black
-    rev: main
+  - repo: https://github.com/psf/black-pre-commit-mirror
+    rev: 26.3.1
     hooks:
       - id: black
-  - repo: https://gitlab.com/pycqa/flake8
-    rev: master
+  - repo: https://github.com/PyCQA/flake8
+    rev: 7.3.0
     hooks:
       - id: flake8