Suggest updating the github uploading a Sarif file docs

[jsoref]

https://github.com/github/codeql-action/blob/1fae5bf71b0ecdc7d0a2ef0d0c28409d99693966/CONTRIBUTING.md#releasing-write-access-required Has a series of steps for making a new release.

One thing it doesn't cover is ensuring that the github/docs are current.

At present, the github docs point to the upload-sarif action (v1/upload-sarif): https://github.com/github/docs/blame/5f4ef9a6217181efc12e67463894783496fb0c79/content/code-security/code-scanning/integrating-with-code-scanning/uploading-a-sarif-file-to-github.md#L57

It seems likely that the docs should point to releases/v2 in some way, shape, or form (this might be a SHA -- see Using third-party actions: Pin actions to a full length commit SHA, or it might be the latest 2.x.y tag).

Since I don't really yet understand this action, I'm going to leave the negotiation between this repository and the github/docs repository to the owners of this repository as you should be in a better position to characterize the right content than I could be.