fix: serverId required in RESTPostChannelsBody

[DaStormer]

Please describe the changes this PR makes and why it should be merged:

Status

• [ ] Code changes have been tested.

Semantic versioning classification:

• [ ] This PR changes the library's interface (methods or parameters added)
• [ ] This PR includes breaking changes (methods removed or renamed, parameters moved or removed)
• [ ] This PR only includes non-code changes, like changes to documentation, README, etc.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 317ba3685ff8dd8fa2d77d0cc2b013313fe77af9

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

This PR includes changesets to release 5 packages

| Name | Type | | ------------------------------ | ----- | | @guildedjs/guilded-api-typings | Patch | | guilded.js | Patch | | @guildedjs/webhook-client | Patch | | @guildedjs/ws | Patch | | @guildedjs/gil | Patch |

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