Restore word-break: break-word on .text-break

Restores word-break: break-word on .text-break to fix text breaking on flex containers.

Fixes #30803 (closed).

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Original issue and PRs:

• v4 backport: #30074
• v5 PR: #29325
• Original issue: #28304 (closed)

Demo: https://codepen.io/emdeoh/pen/dyYjwoO?editors=1100