Auto merge of #116148 - DaniPopes:rustdoc-type-layout-ws, r=jsha

Fix whitespace in rustdoc type_layout.html

`Size: <size>` was missing a space after the colon:

![image](https://github.com/rust-lang/rust/assets/57450786/c5a672f3-a28a-4b56-91e7-a4e6ffc8106e)

Author: bors