Update gentle-trains-attack.md

Author: JoviDeCroock

.changeset/gentle-trains-attack.md

@@ -2,4 +2,6 @@
 'preact-render-to-string': major
 ---
 
-Remove trailing space for void_elements
+Remove trailing space for void_elements, this could fail some test_assertions as
+`<img />` will become `<img/>`, the other `VOID_ELEMENTS` this will be applied for
+can be found [here](https://github.com/preactjs/preact-render-to-string/blob/remove-trailing-space/src/index.js#L368-L385)