Update flyway to v9

Author: renovate[bot]

gradle/libs.versions.toml

@@ -15,7 +15,7 @@ gson = "2.10"
 logback = "1.2.11"
 nightconfig = "3.6.5"
 sqlite = "3.40.0.0"
-flyway = "8.5.13"
+flyway = "9.21.1"
 annotations = "23.0.0"
 lombok = "1.18.24"
 graal = "22.2.0"