Merge pull request #13933 from mhewedy:patch-1

* pr/13933:
  Add classpath prefix to the flyway location

Author: snicoll

spring-boot-project/spring-boot-docs/src/main/asciidoc/howto.adoc

@@ -2219,7 +2219,7 @@ the following:
 
 [source,properties,indent=0]
 ----
-	spring.flyway.locations=db/migration/{vendor}
+	spring.flyway.locations=classpath:db/migration/{vendor}
 ----
 
 Rather than using `db/migration`, the preceding configuration sets the folder to use