Update link

doc/md/writing-motoko/pattern-matching.md

@@ -130,6 +130,6 @@ These blocks allow for safe unwrapping of optional values using a postfix `!` op
 Each use of `!` within the block is equivalent to a switch statement on an option, but with an added benefit: if `!` is applied to a `null` value,  the entire block immediately abandons execution and returns `null`. 
 This short-circuiting behavior simplifies the handling of multiple optional values in a more concise and readable manner.
 
-For an example, see [option blocks and null breaks](control-flow#option-blocks-and-null-breaks).
+For an example, see [option blocks and null breaks](./control-flow#option-blocks-and-null-breaks).
 
 <img src="https://github.com/user-attachments/assets/844ca364-4d71-42b3-aaec-4a6c3509ee2e" alt="Logo" width="150" height="150" />