Update snowflake.mdx (#306)

Author: Paul-Cornell

snippets/general-shared-text/snowflake.mdx

@@ -5,7 +5,7 @@ The Snowflake prerequisites:
   <iframe
   width="560"
   height="315"
-  src="https://www.youtube.com/embed/1ccJgiZRSTg"
+  src="https://www.youtube.com/embed/6HNmxQWqmgg"
   title="YouTube video player"
   frameborder="0"
   allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
@@ -59,4 +59,4 @@ The Snowflake prerequisites:
   frameborder="0"
   allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
   allowfullscreen
-  ></iframe>
+  ></iframe>