URL Cleanup

This commit updates URLs to prefer the https protocol. Redirects are not followed to avoid accidentally expanding intentionally shortened URLs (i.e. if using a URL shortener).

# Fixed URLs

## Fixed Success
These URLs were switched to an https URL with a 2xx status. While the status was successful, your review is still recommended.

* http://spring.io with 1 occurrences migrated to:
  https://spring.io ([https](https://spring.io) result 200).
* http://www.apache.org/licenses/LICENSE-2.0.txt with 1 occurrences migrated to:
  https://www.apache.org/licenses/LICENSE-2.0.txt ([https](https://www.apache.org/licenses/LICENSE-2.0.txt) result 200).

publish-maven.gradle

@@ -34,12 +34,12 @@ def customizePom(pom, gradleProject) {
 			url = linkHomepage
 			organization {
 				name = 'SpringIO'
-				url = 'http://spring.io'
+				url = 'https://spring.io'
 			}
 			licenses {
 				license {
 					name 'The Apache Software License, Version 2.0'
-					url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+					url 'https://www.apache.org/licenses/LICENSE-2.0.txt'
 					distribution 'repo'
 				}
 			}