Update dependency coder/code-server to v4.7.0

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
coder/code-server	minor	4.6.1 -> 4.7.0

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Release Notes

coder/code-server

### [`v4.7.0`](https://togithub.com/coder/code-server/blob/HEAD/CHANGELOG.md#​470-httpsgithubcomcodercode-serverreleasestagv470---2022-09-09) [Compare Source](https://togithub.com/coder/code-server/compare/v4.6.1...v4.7.0) Code v1.71.0 ##### Changed - Updated Code to 1.71.0 ##### Removed - Dropped heartbeat patch because it was implemented upstream ##### Fixed - Add flags --unsafe-perm --legacy-peer-deps in `npm-postinstsall.sh` which ensures installing with npm works correctly

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