fix(deps): update dependency resend to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
resend	^3.0.0 -> ^4.0.0

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Release Notes

resendlabs/resend-node (resend)

v4.0.0

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Major

• Camel case types https://github.com/resend/resend-node/pull/418
  • Create email: reply_to -> replyTo
  • Create email: attachments[].content_type -> attachments[].contentType

Minor

• Add schedule email support https://github.com/resend/resend-node/pull/408 https://github.com/resend/resend-node/pull/412 https://github.com/resend/resend-node/pull/413 https://github.com/resend/resend-node/pull/414 https://github.com/resend/resend-node/pull/419

Patch

• Upgrade typescript to v5.5.4 https://github.com/resend/resend-node/pull/388
• Upgrade @​types/node to v18.19.44 https://github.com/resend/resend-node/pull/383
• Upgrade dependency @​biomejs/biome to v1.8.3 https://github.com/resend/resend-node/pull/386
• Upgrade dependency ts-jest to v29.2.4 https://github.com/resend/resend-node/pull/382
• Upgrade pnpm to v9.7.1 https://github.com/resend/resend-node/pull/403
• Upgrade dependency @​react-email/render to v0.0.17 https://github.com/resend/resend-node/pull/404

v3.5.0

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• fix: Remove optionality from required types #​401
• feat: Export all interfaces for Requests and Responses #​396

v3.4.0

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Minor

• Add new content_type property to the Attachment type https://github.com/resend/resend-node/pull/391
• Handle network error from fetch so instead of throwing we return the error object https://github.com/resend/resend-node/pull/389

v3.3.0

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