Update Artifacts (auto-generated)

[paritytech-subxt-pr-maker]

This PR updates the artifacts by fetching fresh metadata from a substrate node.
It also recreates the polkadot.rs file used in the integration tests.
It was created automatically by a Weekly GitHub Action Cronjob.

[niklasad1]

@tadeohepperle why are the binaries committed here?

[jsdw]

Ah, that'll be because the CI job explicitly deletes substrate-node but now the polkadot binaries are also downloaded and it doesn't delete those.

I wonder whether there's a more general way to delete any extraneous files like this just to give us more confidence that it won't include anything new in the future

[tadeohepperle]

I created a PR to address it, sorry I should have thought about this before. I tried to come up with something more generic, could not find a good way to "sandbox" e.g. the use-nodes action and delete all files at once.

[jsdw]

I guess let's close this and we can re-run or wait for the job to re-run to see if the new PR is good!