Reduce the thickness of the Hr component

[connor-baer]

Purpose

The Hr (horizontal rule) component should be 1px thick according to the design in Figma. Marcela, a designer on the acquisition journey squad, reported the inconsistency 🙌🏻

Approach and changes

• Reduce the Hr thickness from 2px to 1px
• Improve the phrasing of the docs

Definition of done

• Development completed
• Reviewers assigned
• Unit and integration tests
• Meets minimum browser support
• Meets accessibility requirements

[changeset-bot]

🦋 Changeset detected

Latest commit: 3993cc5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@sumup/circuit-ui	Minor

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[vercel]

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🔍 Inspect: https://vercel.com/sumup/oss-circuit-ui/9N2bYam76RMv9Qzdq4niBnLwi4q9
✅ Preview: https://oss-circuit-ui-git-feature-hr-thickness-sumup.vercel.app

[codecov]

Codecov Report

Merging #1036 (3993cc5) into main (d9ac0f9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1036   +/-   ##
=======================================
  Coverage   92.00%   92.00%           
=======================================
  Files         163      163           
  Lines        3016     3016           
  Branches      787      787           
=======================================
  Hits         2775     2775           
  Misses        212      212           
  Partials       29       29           

Impacted Files	Coverage Δ
packages/circuit-ui/components/Hr/Hr.tsx	100.00% <ø> (ø)

[robinmetral]

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