ref #47 yield

docs/tutorial.md

@@ -14,6 +14,7 @@ __Other documents to read__ maybe after this one:
 - [Advanced topics](advanced_topics.md), [declaring arguments](declaring_arguments.md)
 - [OOP notes](OOP.md), [exception handling](exceptions_handling.md)
 - [math in Lyng](math.md)
+- [parallelism] - multithreaded code, coroutines, etc.
 - Some class references: [List], [Set], [Map], [Real], [Range], [Iterable], [Iterator], [time manipulation](time.md)
 - Some samples: [combinatorics](samples/combinatorics.lyng.md), national vars and loops: [сумма ряда](samples/сумма_ряда.lyng.md). More at [samples folder](samples)
 
@@ -1278,4 +1279,5 @@ See [math functions](math.md). Other general purpose functions are:
 [string formatting]: https://github.com/sergeych/mp_stools?tab=readme-ov-file#sprintf-syntax-summary
 [Set]: Set.md
 [Map]: Map.md
-[Buffer]: Buffer.md
+[Buffer]: Buffer.md
+[parallelism]: parallelism.md