chroes(readme): Update readme for release bot (#4779)

* update readme for release bot

* wrong link for the gh app

* commit suggestions

Co-authored-by: anthony sottile <[email protected]>

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Co-authored-by: anthony sottile <[email protected]>

README.md

@@ -68,4 +68,4 @@ The system uses [Craft](https://github.com/getsentry/craft) under the hood to pr
 
 This repo is read-only for everyone except for release managers. This is because all sensitive secrets such as admin-level GitHub access tokens or package repository publishing tokens (npm, PyPI, cargo, etc.) are defined in this repository as secrets and anyone with write access can create or trigger an arbitrary GitHub action workflow, exposing these secrets without any indication. See getsentry/sentry#21930 for an example.
 
-Due to the same reason above, [action-prepare-release](https://github.com/getsentry/action-prepare-release/) needs yet another bot account, [getsentry-release](https://github.com/getsentry-release) that is defined as a regular member of the [engineering team](https://github.com/orgs/getsentry/teams/engineering) to have read access to this private repo. This is to automatically create publish request issues from the action. We cannot use `GITHUB_TOKEN` for these actions as [GitHub prevents triggering more workflows via this token](https://docs.github.com/en/actions/reference/events-that-trigger-workflows). The access token for this account is called `GH_RELEASE_PAT` and it is defined at the organization level.
+Due to the same reason above, [action-prepare-release](https://github.com/getsentry/action-prepare-release/) needs yet another bot, [Sentry Release Bot](https://github.com/apps/sentry-release-bot) is a GitHub App that is installed on all repos in `getsentry` with read and write access to code, PRs, and actions. This is to automatically create publish request issues from the action. We cannot use `GITHUB_TOKEN` for these actions as [GitHub prevents triggering more workflows via this token](https://docs.github.com/en/actions/reference/events-that-trigger-workflows). We utilize the [create-github-app-token](https://github.com/actions/create-github-app-token) to generate a short live token in every action run, with `SENTRY_RELEASE_BOT_CLIENT_ID` and `SENTRY_RELEASE_BOT_PRIVATE_KEY` defined at the organization level.