Add shape_glob_interpolation to default_config.nu (#13198)

# Description

Just missed this during #13089. Adds `shape_glob_interpolation` to the
config.

This actually isn't really going to be seen at all yet, so I debated
whether it's really needed at all. It's only used to highlight the
quotes themselves, and we don't have any quoted glob interpolations at
the moment.

crates/nu-utils/src/sample_config/default_config.nu

@@ -48,6 +48,7 @@ let dark_theme = {
  shape_float: purple_bold
  # shapes are used to change the cli syntax highlighting
  shape_garbage: { fg: white bg: red attr: b}
+ shape_glob_interpolation: cyan_bold
  shape_globpattern: cyan_bold
  shape_int: purple_bold
  shape_internalcall: cyan_bold