Fix typo

Author: kevanstannard

misc_docs/syntax/language_let.mdx

@@ -6,7 +6,7 @@ summary: "This is the `let binding` keyword."
 category: "languageconstructs"
 ---
 
-`let` is used to _bind_ values to names, which is simiar to assigning values to variables in other languages. 
+`let` is used to _bind_ values to names, which is similar to assigning values to variables in other languages. 
 
 ### Example