Merge pull request #10396 from johnA1331/master

BAEL-31912 - add links to github-baeldung articles

core-java-modules/core-java-11-2/README.md

@@ -6,3 +6,4 @@ This module contains articles about Java 11 core features
 - [Guide to Java 8 Optional](https://www.baeldung.com/java-optional)
 - [Guide to Java Reflection](http://www.baeldung.com/java-reflection)
 - [Guide to Java 8’s Collectors](https://www.baeldung.com/java-8-collectors)
+- [New Features in Java 11](https://www.baeldung.com/java-11-new-features)

core-java-modules/core-java-12/README.md

@@ -2,3 +2,4 @@
 
 
 - [String API Updates in Java 12](https://www.baeldung.com/java12-string-api)
+- [Java 12 New Features](https://www.baeldung.com/java-12-new-features)

core-java-modules/core-java-char/README.md

@@ -3,4 +3,4 @@
 This module contains articles about Java Character Class
 
 ### Relevant Articles: 
-- Character#isAlphabetic vs Character#isLetter
+- [Character#isAlphabetic vs Character#isLetter](https://www.baeldung.com/java-character-isletter-isalphabetic)

spring-boot-modules/spring-boot-artifacts-2/README.md

@@ -4,4 +4,4 @@ This module contains articles about configuring the Spring Boot build process 2.
 
 ### Relevant Articles:			
 
-TBD
+- [Difference Between spring-boot:repackage and Maven package](https://www.baeldung.com/spring-boot-repackage-vs-mvn-package)