chore: add resource under cpp:functions:lambda

src/data/roadmaps/cpp/content/103-functions/100-lambda.md

@@ -59,4 +59,7 @@ auto updateDays = [&expiresInDays](int newDays) {
 updateDays(30); // expiresInDays = 30
 ```
 
-Note that, when using the capture by reference, any change made to the captured variable *inside* the lambda function will affect its value in the surrounding scope.
+Note that, when using the capture by reference, any change made to the captured variable *inside* the lambda function will affect its value in the surrounding scope.
+
+- [Lambdas in C++](https://youtu.be/mwgmbbz0y8c)
+- [Lambda Expressions](https://en.cppreference.com/w/cpp/language/lambda)