deps: update com.zaxxer:hikaricp to v6.3.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -29,7 +29,7 @@ flexmark = "0.64.8"
 freemarker = "2.3.34"
 greenmail = "2.1.3"
 gson = "2.12.1"
-hikari = "6.2.1"
+hikari = "6.3.0"
 hoplite = "2.9.0"
 jackson = "2.18.3"
 jakartaMail = "2.0.1"