Docs: Raise exclude limit when generating .rubocop_todo.yml

We have at two cops to exceed the current amount of 10000 offenses:
* RSpec/ContextWording
* RSpec/MultipleMemoizedHelpers

doc/development/contributing/style_guides.md

@@ -146,7 +146,7 @@ One way to generate the initial list is to run the `todo` auto generation,
 with `exclude limit` set to a high number.
 
 ```shell
-bundle exec rubocop --auto-gen-config --auto-gen-only-exclude --exclude-limit=10000
+bundle exec rubocop --auto-gen-config --auto-gen-only-exclude --exclude-limit=100000
 ```
 
 You can then move the list from the freshly generated `.rubocop_todo.yml` for the Cop being actively