Merge pull request #1030 from rcalago/master

Update on README.md

Author: lor6

core-kotlin-modules/core-kotlin-concurrency-3/README.md

@@ -13,4 +13,5 @@ This module contains articles about concurrency in Kotlin.
 - [Merging Kotlin Flows](https://www.baeldung.com/kotlin/flow-merging)
 - [Avoiding the ConcurrentModificationException in Kotlin](https://www.baeldung.com/kotlin/concurrent-modification-exception)
 - [Convert RxJava Single to Kotlin Coroutine Deferred](https://www.baeldung.com/kotlin/rxjava-single-coroutine-deferred)
+- [Sequentially Concatenate 2 Kotlin Flows](https://www.baeldung.com/kotlin/flows-sequential-concatenation)
 - More articles: [[<-- prev]](../core-kotlin-concurrency-2)

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

@@ -10,3 +10,4 @@ This module contains articles about core Kotlin I/O.
 - [Writing InputStream to File in Kotlin](https://www.baeldung.com/kotlin/inputstream-to-file)
 - [Rename a File in Kotlin](https://www.baeldung.com/kotlin/file-rename)
 - [Delete the Contents of a File in Kotlin](https://www.baeldung.com/kotlin/delete-file-content)
+- [File Upload in Kotlin](https://www.baeldung.com/kotlin/file-upload)

core-kotlin-modules/core-kotlin-numbers-2/README.md

@@ -8,4 +8,5 @@ This module contains articles about core Kotlin numbers.
 - [Check if a Number Is Positive or Negative in Kotlin](https://www.baeldung.com/kotlin/number-sign)
 - [Calculate Percentage in Kotlin](https://www.baeldung.com/kotlin/percentage-computation)
 - [Convert Double to String Removing Scientific Notation](https://www.baeldung.com/kotlin/convert-double-string-no-scientific-notation)
+- [Convert Int to Float in Kotlin](https://www.baeldung.com/kotlin/convert-int-float)
 - More articles: [[<-- prev]](../core-kotlin-numbers)