more markdown list formatting

Co-authored-by: Guillaume Gomez <[email protected]>

Author: Ezrashaw

compiler/rustc_error_codes/src/error_codes/E0460.md

@@ -64,8 +64,8 @@ dependencies, without using the compiler's own dependency management that
 causes this issue.
 
 This error can be fixed by:
-* Using [Cargo], the Rust package manager, automatically fixing this issue.
-* Recompiling crate `a` so that both crate `b` and `main` have a uniform
-version to depend on.
+ * Using [Cargo], the Rust package manager, automatically fixing this issue.
+ * Recompiling crate `a` so that both crate `b` and `main` have a uniform
+   version to depend on.
 
 [Cargo]: ../cargo/index.html