Remove domain that does not exist from pre-generation list, thus fixing build.

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[X] I have read the README and Contributor Guidelines
[X] I have signed the Contributor Licence Agreement

Contributor checklist:

[X] My contribution is not related to translations.
[X] My commits are in nice logical chunks with good commit messages
[X] My changes are rebased on the latest main branch
[X] A yarn ready run passes successfully (more about tests here)
[X] My changes are ready to be shipped to users

Description

Hi! I hope this isn't noise.

I was trying to build the project to test my other contribution. I could not do so successfully. My build kept failing with this error:

Error: getaddrinfo ENOTFOUND create.signal.art
    at GetAddrInfoReqWrap.onlookupall [as oncomplete] (node:dns:118:26) {
  errno: -3008,
  code: 'ENOTFOUND',
  syscall: 'getaddrinfo',
  hostname: 'create.signal.art'
}

When I check for the existence of this domain via dig create.signal.art A +short, I get that no record exists. I also do not see it checking on an external tool (e.g. mxtoolbox.com), so I don't think it's a problem with my machine configuration.

To resolve this, I just removed the "create.signal.art" domain from the generate-dns-fallback.ts file. I see that @indutny-signal created this just a few weeks ago, so hopefully this is the right thing to do.

Test Strategy

All tests passed when I ran yarn ready. I also was able to launch the app and send a message to myself using yarn start.

signalapp / Signal-Desktop