Update 01-introduction.md - fixes ro-crate specification link

Author: marshallmcdonnell

episodes/01-introduction.md

@@ -52,7 +52,7 @@ _Video: An overview of the RO-Crate concept and its implementations_ (see also [
 
 ## Tutorial walk-through
 
-In this tutorial, meant to be read along with the [RO-Crate specification](https://www.researchobject.org/ro-crate/1.2/),
+In this tutorial, meant to be read along with the [RO-Crate specification](https://www.researchobject.org/ro-crate/specification/1.2/),
 we'll walk through the initial steps for creating a basic RO-Crate.
 You are invited to replicate the below steps on your local computer.
 
@@ -73,4 +73,4 @@ You are invited to replicate the below steps on your local computer.
 - Each entity of the crate is described separately
 - Cross-references between entities create a graph
 - The RO-Crate specification recommends which types and keys to use
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