Use official actions/create-github-app-token for auto-merge

[PerchunPak]

Currently CI fails with:

Run tibdex/github-app-token@v2
  with:
    github_api_url: https://github.com/gitapi/
    installation_retrieval_mode: repository
    installation_retrieval_payload: py-mine/mcstatus
    revoke: true

Error: Input required and not supplied: app_id
    at getInput (file:///home/runner/work/_actions/tibdex/github-app-token/v2/dist/main/index.js:1:3828)
    at parseOptions (file:///home/runner/work/_actions/tibdex/github-app-token/v2/dist/main/index.js:9:87889)
    at file:///home/runner/work/_actions/tibdex/github-app-token/v2/dist/main/index.js:9:87507
    at run (file:///home/runner/work/_actions/tibdex/github-app-token/v2/dist/main/index.js:9:88817)
    at file:///home/runner/work/_actions/tibdex/github-app-token/v2/dist/main/index.js:9:87480
    at __nccwpck_require__.a (file:///home/runner/work/_actions/tibdex/github-app-token/v2/dist/main/index.js:9:368729)
    at 399 (file:///home/runner/work/_actions/tibdex/github-app-token/v2/dist/main/index.js:9:87363)
    at __nccwpck_require__ (file:///home/runner/work/_actions/tibdex/github-app-token/v2/dist/main/index.js:9:367817)
    at file:///home/runner/work/_actions/tibdex/github-app-token/v2/dist/main/index.js:9:369615
    at ModuleJob.run (node:internal/modules/esm/module_job:217:25)

Firstly I thought ItsDrike forgot to add app_id argument, but it is false. Then I looked at tibdex/github-app-token's issue tracker and found tibdex/github-app-token#99.

So this issue is probably a bug somewhere in the action, but as there is an official alternative to this GH action, why not use it instead? Furthermore, it seems to be actively maintained, so we shouldn't face such fundamental errors.

[ItsDrike]

Oh, good catch! Didn't know there was an official action.

Yeah, I'm pretty confused by that CI error, I've re-created the CI_BOT_APP_ID secret var, just in case I accidentally created it with just an empty value or something, but I doubt it, it is indeed possible that this is a bug in the action, which would explain the error.

Let's see what happens with the official action then.