Bump nightly version used for ui tests #4646

Job	Run time
check-docs	21s
check	2m 8s
cargo-hack	5m 41s
cargo-deny check (advisories)	23s
cargo-public-api-crates (axum)	29s
cargo-deny check (bans licenses sources)	26s
dependencies-are-sorted	14s
cargo-public-api-crates (axum-core)	23s
cargo-public-api-crates (axum-extra)	33s
Spell Check with Typos	4s
cargo-public-api-crates (axum-macros)	16s
test-msrv	5m 12s
armv5te-unknown-linux-musleabi	18s
test-nightly	1m 53s
test-docs	2m 7s
test-versions (stable)	3m 41s
wasm32-unknown-unknown	17s
test-versions (beta)	3m 38s
	28m 4s

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