examples: Update to sqlx 0.9

Author: tottoto

Cargo.lock

@@ -10,4 +10,4 @@ tokio = { version = "1.0", features = ["full"] }
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 
-sqlx = { version = "0.8", features = ["runtime-tokio-rustls", "any", "postgres"] }
+sqlx = { version = "=0.9.0-alpha.1", features = ["runtime-tokio", "any", "postgres"] }