chore(deps): update dependency black to v26 (#925)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [black](https://redirect.github.com/psf/black)
([changelog](https://redirect.github.com/psf/black/blob/main/CHANGES.md))
| `==25.12.0` → `==26.1.0` |
![age](https://developer.mend.io/api/mc/badges/age/pypi/black/26.1.0?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/black/25.12.0/26.1.0?slim=true)
|

---

### Release Notes

<details>
<summary>psf/black (black)</summary>

###
[`v26.1.0`](https://redirect.github.com/psf/black/blob/HEAD/CHANGES.md#2610)

[Compare
Source](https://redirect.github.com/psf/black/compare/25.12.0...26.1.0)

##### Highlights

Introduces the 2026 stable style
([#&#8203;4892](https://redirect.github.com/psf/black/issues/4892)),
stabilizing the following changes:

- `always_one_newline_after_import`: Always force one blank line after
import
statements, except when the line after the import is a comment or an
import statement
  ([#&#8203;4489](https://redirect.github.com/psf/black/issues/4489))
- `fix_fmt_skip_in_one_liners`: Fix `# fmt: skip` behavior on one-liner
declarations,
such as `def foo(): return "mock" # fmt: skip`, where previously the
declaration would
have been incorrectly collapsed
([#&#8203;4800](https://redirect.github.com/psf/black/issues/4800))
- `fix_module_docstring_detection`: Fix module docstrings being treated
as normal
strings if preceded by comments
([#&#8203;4764](https://redirect.github.com/psf/black/issues/4764))
- `fix_type_expansion_split`: Fix type expansions split in generic
functions
([#&#8203;4777](https://redirect.github.com/psf/black/issues/4777))
- `multiline_string_handling`: Make expressions involving multiline
strings more compact
  ([#&#8203;1879](https://redirect.github.com/psf/black/issues/1879))
- `normalize_cr_newlines`: Add `\r` style newlines to the potential
newlines to
normalize file newlines both from and to
([#&#8203;4710](https://redirect.github.com/psf/black/issues/4710))
- `remove_parens_around_except_types`: Remove parentheses around
multiple exception
types in `except` and `except*` without `as`
([#&#8203;4720](https://redirect.github.com/psf/black/issues/4720))
- `remove_parens_from_assignment_lhs`: Remove unnecessary parentheses
from the left-hand
side of assignments while preserving magic trailing commas and
intentional multiline
formatting
([#&#8203;4865](https://redirect.github.com/psf/black/issues/4865))
- `standardize_type_comments`: Format type comments which have zero or
more spaces
between `#` and `type:` or between `type:` and value to `# type:
(value)`
([#&#8203;4645](https://redirect.github.com/psf/black/issues/4645))

The following change was not in any previous stable release:

- Regenerated the `_width_table.py` and added tests for the Khmer
language
([#&#8203;4253](https://redirect.github.com/psf/black/issues/4253))

This release alo bumps `pathspec` to v1 and fixes inconsistencies with
Git's
`.gitignore` logic
([#&#8203;4958](https://redirect.github.com/psf/black/issues/4958)).
Now, files will be ignored if a pattern matches them, even
if the parent directory is directly unignored. For example, Black would
previously
format `exclude/not_this/foo.py` with this `.gitignore`:

```
exclude/
!exclude/not_this/
```

Now, `exclude/not_this/foo.py` will remain ignored. To ensure
`exclude/not_this/` and
all of it's children are included in formatting (and in Git), use this
`.gitignore`:

```
*/exclude/*
!*/exclude/not_this/
```

This new behavior matches Git. The leading `*/` are only necessary if
you wish to ignore
matching subdirectories (like the previous behavior did), and not just
matching root
directories.

##### Output

- Explicitly shutdown the multiprocessing manager when run in diff mode
too ([#&#8203;4952](https://redirect.github.com/psf/black/issues/4952))

##### Integrations

- Upgraded PyPI upload workflow to use Trusted Publishing
([#&#8203;4611](https://redirect.github.com/psf/black/issues/4611))

</details>

---

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---

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requirements-dev.txt

@@ -9,4 +9,4 @@ sphinx-rtd-theme==3.1.0 ; python_version >= "3.11"
 sphinx-rtd-theme==3.1.0 ; python_version < "3.11"
 pypandoc==1.16.2
 twine==6.2.0
-black==25.12.0
+black==26.1.0