[proxy] Ensure that `socket.remoteAddress` is a string

[TooTallNate]

It's possible that this value is undefined, so skip adding it to the x-forwarded-for header in that case.

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🦋 Changeset detected

Latest commit: 1ad34c5a912720771078e5c90889aa4ce7edd2a7

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ----- | ----- | | proxy | Patch |

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Name	Status	Preview	Updated (UTC)
proxy-agents	✅ Ready (Inspect)	Visit Preview	May 18, 2023 6:39pm