[pushed] [pre-commit] Set stages for isort

I noticed that isort runs for the manual stage:
...
$ pre-commit run --hook-stage manual
isort...............................................(no files to check)Skipped
...

That happens because unlike any other repo we're currently using, isort's
.pre-commit-hooks.yaml sets stages:
...
stages: [pre-commit, pre-merge-commit, pre-push, manual]
...
overriding the default setting in our .pre-commit-config.yaml:
...
default_stages: [pre-commit]
...

Fix this by adding a stages setting to the isort hook.
---
 .pre-commit-config.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 141f14ba72c..60164e446fc 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -74,6 +74,9 @@ repos:
     - id: isort
       types_or: *gdb_python_types
       files: *gdb_python_files
+      # Isort's .pre-commit-hooks.yaml sets stages, overriding default_stages,
+      # so this hook needs an explicit setting.
+      stages: [pre-commit]
 
   # Codespell hooks.
   - repo: https://github.com/codespell-project/codespell

base-commit: 705b16039e6f1e499b96d8ecd08d5154f62d7d38
-- 
2.51.0