Fix: Update message slightly uneven

[ShaneMuir]

Trac ticket: Fix - Update message slightly uneven

Applied fix based on this comment:- https://core.trac.wordpress.org/ticket/64588#comment:2

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[github-actions]

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Props shanemuir.

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[github-actions]

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[mukeshpanchal27]

Suggested change

	.update-php .js-update-details-toggle {
	.js-update-details-toggle {

Why we need .update-php?