Fixed warning Failure to use HTTPS or SFTP URL in Maven artifact upload/download

Author: javadev

spring-boot-example/pom.xml

@@ -19,7 +19,7 @@
         <repository> 
             <id>repository.spring.release</id> 
             <name>Spring GA Repository</name> 
-            <url>http://repo.spring.io/release</url> 
+            <url>https://repo.spring.io/release</url> 
         </repository>
     </repositories>
     <dependencies>