Fix list item formatting in markdown

Author: nellshamrell

draft/2024-12-25-this-week-in-rust.md

@@ -45,7 +45,7 @@ and just ask the editors to select the category.
 
 ### Miscellaneous
 
-- [Rust university course exercises](https://kobzol.github.io/teaching/2024/12/18/rust-exercises.html)
+* [Rust university course exercises](https://kobzol.github.io/teaching/2024/12/18/rust-exercises.html)
 
 ## Crate of the Week