📝 Update changelog

Author: fruno-bulax

CHANGELOG.md

@@ -48,6 +48,12 @@
 
   ([fruno](https://github.com/fruno-bulax/))
 
+- Changing the source of a package (like going from hex to a path dependency)
+  now correctly updates the manifest to reflect this. Previously the source
+  was not updated, causing gleam to hit hex to resolve versions on every
+  operation.
+  ([fruno](https://github.com/fruno-bulax/))
+
 - The performance of `==` and `!=` has been improved for single-variant custom
   types when compiling to JavaScript. This was done by generating comparison
   code specific to the custom type rather than using the generic equality check