Fix broken records anchor link (#437)

Author: ryyppy

pages/docs/manual/latest/variant.mdx

@@ -310,7 +310,7 @@ ReScript also provides [a few other ways](bind-to-js-function.md#modeling-polymo
 
 ### Variant Types Are Found By Field Name
 
-Please refer to this [record section](record#record-types-are-found-by-field-name). Variants are the same: a function can't accept an arbitrary constructor shared by two different variants. Again, such feature exists; it's called a polymorphic variant. We'll talk about this in the future =).
+Please refer to this [record section](record#tips--tricks). Variants are the same: a function can't accept an arbitrary constructor shared by two different variants. Again, such feature exists; it's called a polymorphic variant. We'll talk about this in the future =).
 
 ## Design Decisions