update Go types and type assertions (kamranahmedse#6260)

* update Go types and type assertions * Update src/data/roadmaps/golang/content/101-go-advanced/102-types-and-type-assertions.md --------- Co-authored-by: dsh <[email protected]>
zhusl · Jul 29, 2024 · 24533cc · 24533cc
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diff --git a/src/data/roadmaps/golang/content/101-go-advanced/102-types-and-type-assertions.md b/src/data/roadmaps/golang/content/101-go-advanced/102-types-and-type-assertions.md
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 # Types and type assertions
 
+Types in Golang specify the data type that a valid Go variable can hold. Golang has four categories of Types including Basic, Aggregate, Reference, and Interface Types
+
 Type assertions in Golang provide access to the exact type of variable of an interface.
 
 Visit the following resources to learn more:
 
 - [@official@Types Assertions ](https://go.dev/tour/methods/15)
+- [@video@Go Syntax - Type Assertions ](https://youtube.com/watch?v=vtGbi9bGr3s)