Merge pull request #878 from rcalago/master

Update on README.md

Author: lor6

core-kotlin-modules/core-kotlin-10/README.md

@@ -1,6 +1,7 @@
-## Relevant Articles
+### Relevant Articles
 - [Determine Operating System in Kotlin](https://www.baeldung.com/kotlin/operating-system-identify)
 - [Kotlin when vs. Java switch Statement](https://www.baeldung.com/kotlin/when-vs-java-switch)
 - [Kotlin AES Encryption and Decryption](https://www.baeldung.com/kotlin/advanced-encryption-standard)
 - [Cloning an Object in Kotlin](https://www.baeldung.com/kotlin/clone-object)
 - [Assignment in While Expression in Kotlin](https://www.baeldung.com/kotlin/while-variable-assignment)
+- [Breadth-First Search Algorithm in Kotlin](https://www.baeldung.com/kotlin/bfs-graphs)

core-kotlin-modules/core-kotlin-collections-6/README.md

@@ -1,2 +1,3 @@
 ### Relevant Articles: 
 - [Convert a Collection Into an ArrayList in Kotlin](https://www.baeldung.com/kotlin/collection-arraylist-conversion)
+- [Iterate a Collection Referencing Previous Element in Kotlin](https://www.baeldung.com/kotlin/collection-previous-element)

core-kotlin-modules/core-kotlin-design-patterns/README.md

@@ -10,3 +10,4 @@ This module contains articles about design patterns in Kotlin
 - [The Adapter Pattern in Kotlin](https://www.baeldung.com/kotlin/adapter-pattern)
 - [The Facade Pattern in Kotlin](https://www.baeldung.com/kotlin/facade-pattern)
 - [The Visitor Pattern in Kotlin](https://www.baeldung.com/kotlin/visitor-pattern)
+- [The Composite Pattern in Kotlin](https://www.baeldung.com/kotlin/composite-design-pattern)

kotlin-yaml/README.md

@@ -0,0 +1,2 @@
+### Relevant Articles
+- [Guide to Reading YAML Content in Kotlin](https://www.baeldung.com/kotlin/yaml-reading)