docs(Capacitor): Add deprecation warning to session replay

[lucas-zimerman]

DESCRIBE YOUR PR

Session replay will no longer be supported on Version 4 of Sentry Capacitor.
This warning warns the deprecation of the feature when opening the session replay page.

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Project	Deployment	Actions	Updated (UTC)
sentry-docs	Ready	Preview, Comment	Apr 2, 2026 3:04pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
develop-docs	Ignored		Apr 2, 2026 3:04pm

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