Merge pull request #10419 from johnA1331/master

BAEL-31913 - add links to github-baeldung articles

core-java-modules/core-java-concurrency-advanced-4/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Binary Semaphore vs Reentrant Lock](https://www.baeldung.com/java-binary-semaphore-vs-reentrant-lock)

core-java-modules/core-java-io-4/README.md

@@ -4,5 +4,5 @@ This module contains articles about core Java input and output (IO)
 
 ### Relevant Articles: 
 
-- [Java File Separator vs File Path Separator]
+- [Java File Separator vs File Path Separator](https://www.baeldung.com/java-file-vs-file-path-separator)
 - [[<-- Prev]](/core-java-modules/core-java-io-3)

guest/core-kotlin/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Kotlin vs Java](https://www.baeldung.com/kotlin/kotlin-vs-java)

jackson-modules/jackson-conversions-2/README.md

@@ -9,4 +9,5 @@ This module contains articles about Jackson conversions.
 - [Converting JSON to CSV in Java](https://www.baeldung.com/java-converting-json-to-csv)
 - [How to Process YAML with Jackson](https://www.baeldung.com/jackson-yaml)
 - [Jackson Streaming API](https://www.baeldung.com/jackson-streaming-api)
+- [Jackson: java.util.LinkedHashMap cannot be cast to X](https://www.baeldung.com/jackson-linkedhashmap-cannot-be-cast)
 - More articles: [[<-- prev]](../jackson-conversions)