Bump the packaging group across 1 directory with 2 updates

Bumps the packaging group with 2 updates in the / directory: [packaging](https://github.com/pypa/packaging) and [build](https://github.com/pypa/build).


Updates `packaging` from 25.0 to 26.0
- [Release notes](https://github.com/pypa/packaging/releases)
- [Changelog](https://github.com/pypa/packaging/blob/main/CHANGELOG.rst)
- [Commits](pypa/packaging@25.0...26.0)

Updates `build` from 1.3.0 to 1.4.0
- [Release notes](https://github.com/pypa/build/releases)
- [Changelog](https://github.com/pypa/build/blob/main/CHANGELOG.rst)
- [Commits](pypa/build@1.3.0...1.4.0)

---
updated-dependencies:
- dependency-name: packaging
  dependency-version: '26.0'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: packaging
- dependency-name: build
  dependency-version: 1.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: packaging
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements_mypy.txt

@@ -22,7 +22,7 @@ mypy==1.18.2
     # via -r requirements_mypy.in
 mypy-extensions==1.0.0
     # via mypy
-packaging==25.0
+packaging==26.0
     # via hatchling
 pathspec==0.12.1
     # via

requirements_tests.txt

@@ -12,7 +12,7 @@ automat==24.8.1
     # via twisted
 backports-tarfile==1.2.0
     # via jaraco-context
-build==1.3.0
+build==1.4.0
     # via -r requirements_tests.in
 certifi==2025.10.5
     # via
@@ -85,7 +85,7 @@ more-itertools==10.3.0
     # via
     #   jaraco-classes
     #   jaraco-functools
-packaging==25.0
+packaging==26.0
     # via
     #   build
     #   hatch