Bump the pypi-updates group with 7 updates

Bumps the pypi-updates group with 7 updates:

| Package | From | To |
| --- | --- | --- |
| [google-auth](https://github.com/googleapis/google-auth-library-python) | `2.45.0` | `2.48.0` |
| [google-api-python-client](https://github.com/googleapis/google-api-python-client) | `2.187.0` | `2.188.0` |
| [black](https://github.com/psf/black) | `25.12.0` | `26.1.0` |
| [types-python-dateutil](https://github.com/typeshed-internal/stub_uploader) | `2.9.0.20251115` | `2.9.0.20260124` |
| [myst-parser](https://github.com/executablebooks/MyST-Parser) | `4.0.1` | `5.0.0` |
| [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) | `3.0.2` | `3.1.0` |
| [sphinx-design](https://github.com/executablebooks/sphinx-design) | `0.6.1` | `0.7.0` |


Updates `google-auth` from 2.45.0 to 2.48.0
- [Release notes](https://github.com/googleapis/google-auth-library-python/releases)
- [Changelog](https://github.com/googleapis/google-auth-library-python/blob/main/CHANGELOG.md)
- [Commits](https://github.com/googleapis/google-auth-library-python/compare/v2.45.0...v2.48.0)

Updates `google-api-python-client` from 2.187.0 to 2.188.0
- [Release notes](https://github.com/googleapis/google-api-python-client/releases)
- [Commits](https://github.com/googleapis/google-api-python-client/compare/v2.187.0...v2.188.0)

Updates `black` from 25.12.0 to 26.1.0
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](https://github.com/psf/black/compare/25.12.0...26.1.0)

Updates `types-python-dateutil` from 2.9.0.20251115 to 2.9.0.20260124
- [Commits](https://github.com/typeshed-internal/stub_uploader/commits)

Updates `myst-parser` from 4.0.1 to 5.0.0
- [Release notes](https://github.com/executablebooks/MyST-Parser/releases)
- [Changelog](https://github.com/executablebooks/MyST-Parser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/executablebooks/MyST-Parser/compare/v4.0.1...v5.0.0)

Updates `sphinx-rtd-theme` from 3.0.2 to 3.1.0
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](https://github.com/readthedocs/sphinx_rtd_theme/compare/3.0.2...3.1.0)

Updates `sphinx-design` from 0.6.1 to 0.7.0
- [Release notes](https://github.com/executablebooks/sphinx-design/releases)
- [Changelog](https://github.com/executablebooks/sphinx-design/blob/main/CHANGELOG.md)
- [Commits](https://github.com/executablebooks/sphinx-design/compare/v0.6.1...v0.7.0)

---
updated-dependencies:
- dependency-name: google-auth
  dependency-version: 2.48.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: pypi-updates
- dependency-name: google-api-python-client
  dependency-version: 2.188.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: pypi-updates
- dependency-name: black
  dependency-version: 26.1.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: pypi-updates
- dependency-name: types-python-dateutil
  dependency-version: 2.9.0.20260124
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: pypi-updates
- dependency-name: myst-parser
  dependency-version: 5.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: pypi-updates
- dependency-name: sphinx-rtd-theme
  dependency-version: 3.1.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: pypi-updates
- dependency-name: sphinx-design
  dependency-version: 0.7.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: pypi-updates
...

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

pyproject.toml

@@ -18,8 +18,8 @@ classifiers = [
 
 [tool.poetry.dependencies]
 python = "^3.11"
-google-auth = "2.45.0"
-google-api-python-client = "2.187.0"
+google-auth = "2.48.0"
+google-api-python-client = "2.188.0"
 icalendar = "6.3.2"
 pytz = "2025.2"
 PyYAML = "6.0.3"
@@ -34,7 +34,7 @@ optional = true
 [tool.poetry.group.dev.dependencies]
 pytest = ">=8.1,<10.0"
 flake8 = ">=7.0.4,<8.0.0"
-black = ">=25.0,<26.0"
+black = ">=25.0,<27.0"
 mypy = ">=1.16.1"
 types-python-dateutil = ">=2.9.0.20250516"
 types-pytz = ">=2025.2.0.20250516"
@@ -43,10 +43,10 @@ lxml = ">=5.4.0,<7.0.0"
 
 [tool.poetry.group.docs.dependencies]
 sphinx = ">=8.2,<9.0"
-myst-parser = ">=4,<5"
+myst-parser = ">=4,<6"
 sphinx-rtd-theme = ">=3.0.2,<4.0.0"
 sphinx-copybutton = "^0.5.2"
-sphinx-design = ">=0.6,<0.7"
+sphinx-design = ">=0.6,<0.8"
 
 [tool.poetry.scripts]
 sync-ics2gcal = "sync_ics2gcal.sync_calendar:main"