[ci] fix test-frame-ui job (#2672)

The test frame ui started failing consistently on latest master [1]. I
assume it was because of a race between
https://github.com/paritytech/polkadot-sdk/pull/1343 which introduced
this warning and a PR that updated our tooling version, hence the
warnings don't match perfectly, so regenerated them with
`TRYBUILD=overwrite` as the test suggests.

[1] https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4666766

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Signed-off-by: Alexandru Gheorghe <alexandru.gheorghe@parity.io>