Fixed accordion icon on large title

[girishpanchal30]

Closes #1937

Checklist before the final review

• Included E2E or unit tests for the changes in this PR.
• Visual elements are not affected by independent changes.
• It is at least compatible with the minimum WordPress version.
• It loads additional script in frontend only if it is required.
• Does not impact the Core Web Vitals.
• In case of deprecation, old blocks are safely migrated.
• It is usable in Widgets and FSE.
• Copy/Paste is working if the attributes are modified.
• PR is following the best practices

[pirate-bot]

Bundle Size Diff

Package	Old Size	New Size	Diff
Animations	276.77 KB	276.77 KB	0 B (0.00%)
Blocks	1.55 MB	1.55 MB	0 B (0.00%)
CSS	105.9 KB	105.9 KB	0 B (0.00%)
Dashboard	204.08 KB	204.08 KB	0 B (0.00%)
Onboarding	165.94 KB	165.94 KB	0 B (0.00%)
Export Import	102.86 KB	102.86 KB	0 B (0.00%)
Pro	412.21 KB	412.21 KB	0 B (0.00%)

[Copilot]

Pull request overview

Fixes the Accordion block’s default chevron icon deforming when the title wraps onto multiple lines (notably in narrow layouts like sidebars).

Changes:

• Adds a flex-shrink: 0 rule to prevent the default closed-state pseudo-element icon from shrinking in flex layouts.

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E2E Tests

Playwright Test Status:

Performance Results

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[pirate-bot]

🎉 This PR is included in version 3.1.8 🎉

The release is available on GitHub release

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