Replace 'zeit/ncc' with 'vercel/ncc'

[NotMyFault]

While working on #115, I noticed that 'yarn build' fails with the following error:

➜  actions-label-merge-conflict git:(main) yarn build   
yarn run v1.22.21
$ ncc build sources/main.ts
ncc: Version 0.22.3
ncc: Compiling file index.js
Error: error:0308010C:digital envelope routines::unsupported
    at new Hash (node:internal/crypto/hash:68:19)
    at Object.createHash (node:crypto:138:10)
    at hashOf (/Users/alex/github/actions-label-merge-conflict/node_modules/@zeit/ncc/dist/ncc/index.js.cache.js:3:58216)
    at module.exports (/Users/alex/github/actions-label-merge-conflict/node_modules/@zeit/ncc/dist/ncc/index.js.cache.js:3:60642)
    at runCmd (/Users/alex/github/actions-label-merge-conflict/node_modules/@zeit/ncc/dist/ncc/cli.js.cache.js:1:47355)
    at 819 (/Users/alex/github/actions-label-merge-conflict/node_modules/@zeit/ncc/dist/ncc/cli.js.cache.js:1:44227)
    at __webpack_require__ (/Users/alex/github/actions-label-merge-conflict/node_modules/@zeit/ncc/dist/ncc/cli.js.cache.js:1:169)
    at startup (/Users/alex/github/actions-label-merge-conflict/node_modules/@zeit/ncc/dist/ncc/cli.js.cache.js:1:339)
    at module.exports.8 (/Users/alex/github/actions-label-merge-conflict/node_modules/@zeit/ncc/dist/ncc/cli.js.cache.js:1:371)
    at /Users/alex/github/actions-label-merge-conflict/node_modules/@zeit/ncc/dist/ncc/cli.js.cache.js:1:381 {
  opensslErrorStack: [ 'error:03000086:digital envelope routines::initialization error' ],
  library: 'digital envelope routines',
  reason: 'unsupported',
  code: 'ERR_OSSL_EVP_UNSUPPORTED'
}
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Given I can replicate the same error on the default branch, I filed this PR independently of my other PR.

According to the warning on the NPM page of zeit ncc it's eol.
Clicking on the GH repository URL of zeit ncc redirects to vercel ncc.

[eps1lon]

Thank you!