chore: bump sqlx to 0.8 in examples (#688) #1192

Job	Run time
check-fmt	21s
tests (https://releases.nixos.org/nix/nix-2.18.2/install)	1m 39s
examples-darwin	5m 48s
tests (https://releases.nixos.org/nix/nix-2.18.2/install, --override-input nixpkgs $(./ci/ref-fro...	2m 15s
examples-linux (alt-registry)	1m 4s
check-dead-code	22s
examples-linux (build-std)	1m 4s
examples-linux (cross-musl)	1m 7s
examples-linux (cross-rust-overlay)	1m 7s
examples-linux (cross-windows)	1m 7s
examples-linux (custom-toolchain)	1m 7s
examples-linux (end-to-end-testing)	3m 40s
examples-linux (quick-start)	1m 4s
examples-linux (quick-start-simple)	1m 3s
examples-linux (quick-start-workspace)	1m 8s
examples-linux (sqlx)	3m 50s
examples-linux (trunk-workspace)	1m 14s
examples-linux (trunk)	1m 7s
all systems go	0s
	30m 7s

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