Update dependency org.flywaydb:flyway-core to v8.5.7 (#177)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -14,7 +14,7 @@ gson = "2.9.0"
 logback = "1.2.11"
 nightconfig = "3.6.5"
 sqlite = "3.36.0.3"
-flyway = "8.5.5"
+flyway = "8.5.7"
 annotations = "23.0.0"
 lombok = "1.18.22"
 discord4j = "3.3.0-SNAPSHOT"