Revert "Start building against Spring Batch 4.3.8 snapshots"

This reverts commit 41914ab.

4.3.8 has been postponed

See gh-33135

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

@@ -1679,7 +1679,7 @@ bom {
 			]
 		}
 	}
-	library("Spring Batch", "4.3.8-SNAPSHOT") {
+	library("Spring Batch", "4.3.7") {
 		prohibit("[5.0.0-M1,)") {
 			because "it uses Spring Framework 6"
 		}