Fix typos

Closes gh-5025

spring-boot-samples/spring-boot-sample-flyway/README.adoc

@@ -2,8 +2,8 @@
 
 This sample demonstrates the flyway auto-configuration support.
 
-You can look at `http//localhost:8080/flyway` to review the list of scripts.
+You can look at `http://localhost:8080/flyway` to review the list of scripts.
 
-This sample also enables the H2 console (at `http//localhost:8080/h2-console`)
+This sample also enables the H2 console (at `http://localhost:8080/h2-console`)
 so that you can review the state of the database (the default jdbc url is
 `jdbc:h2:mem:testdb`).