examples: Update to sqlx 0.9 #5838

Job	Run time
check-docs	40s
check	55s
cargo-deny check (bans licenses sources)	28s
dependencies-are-sorted	4s
Spell Check with Typos	8s
cargo-deny check (advisories)	27s
cargo-public-api-crates (axum-extra)	28s
cargo-public-api-crates (axum-core)	22s
cargo-public-api-crates (axum)	33s
cargo-public-api-crates (axum-macros)	20s
cargo-hack	3m 20s
test-nightly	1m 21s
test-msrv	2m 30s
test-versions (stable)	1m 41s
test-versions (beta)	1m 38s
test-docs	1m 17s
armv5te-unknown-linux-musleabi	35s
wasm32-unknown-unknown	28s
	17m 15s

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