Configure MySQL with a same-major upgrade policy

Closes gh-46487

Author: wilkinsona

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -1555,6 +1555,7 @@ bom {
 		}
 	}
 	library("MySQL", "9.3.0") {
+		upgradePolicy = "same-major"
 		group("com.mysql") {
 			modules = [
 				"mysql-connector-j" {