fix(styles): fix linting in the styles package

[alionazherdetska]

📄 Description

This PR resolves several stylelint violations found in the styles package:

Changes Made:
📁 _notification.scss
Fixed line length
📁 _spinners.scss
Removed trailing whitespace
📁 _post-footer.scss
Fixed selector complexity

🚀 Demo

If applicable, please add a screenshot or video to illustrate the changes.

---

📝 Checklist

• ✅ My code follows the style guidelines of this project
• 🛠️ I have performed a self-review of my own code
• 📄 I have made corresponding changes to the documentation
• ⚠️ My changes generate no new warnings or errors
• 🧪 I have added tests that prove my fix is effective or that my feature works
• ✔️ New and existing unit tests pass locally with my changes

[changeset-bot]

⚠️ No Changeset found

Latest commit: b63c3e0

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[swisspost-bot]

Related Previews

• https://preview-6358--swisspost-design-system-next.netlify.app