Enable Layout/SpaceInsideHashLiteralBraces

- This is part of our styleguide and was enabled in `github/github` in 2022, so let's make it the default.

Author: issyl0

config/default.yml

@@ -331,7 +331,8 @@ Layout/SpaceInsideBlockBraces:
   Enabled: true
 
 Layout/SpaceInsideHashLiteralBraces:
-  Enabled: false
+  Enabled: true
+  StyleGuide: https://github.com/github/rubocop-github/blob/main/STYLEGUIDE.md#spaces-operators
 
 Layout/SpaceInsideParens:
   Enabled: true