fixup! Update cop department namespacing upgrade docs

Author: pirj

docs/modules/ROOT/pages/upgrade_to_version_2.adoc

@@ -7,7 +7,7 @@ In version 2.x:
 
  - `RSpec/InvalidPredicateMatcher` cop is removed
  - `CustomIncludeMethods` configuration option for `RSpec/EmptyExampleGroup` is removed
- - cop departments are nested
+ - cop departments are nested for cops with a department that doesn't match the extension name (`Capybara`, `FactoryBot`, `Rails`)
 
 [discrete]
 === Adjust the configuration of `RSpec/EmptyExampleGroup`
@@ -33,33 +33,35 @@ AllCops:
 === Add a top-level `RSpec` department
 
 RuboCop extensions had cops with clashing names and departments, e.g. both `rspec-rails` and `rubocop-rspec` had `Rails::HttpStatus` cops.
-Also, in some circumstances RuboCop was complaining that some cops have wrong departments specified in the config file, e.g. `RSpec::FilePath` and `Rails::FilePath`, `RSpec/VariableName` and `Naming/VariableName`.
 To avoid issues, e.g. inability to disable just one of the cops, each extension now has its own uber-department.
 Expectedly, RuboCop RSpec's uber-department name is `RSpec`.
+Changes are only applied to cops that don't already have the department set to `RSpec`, i.e. `Capybara`, `FactoryBot` and `Rails`.
 
 [source,yaml]
 ----
 # .rubocop.yml
 
 # Before
-RSpec/EmptyExampleGroup:
-  Enabled: false
-
 Capybara/CurrentPathExpectation:
   Enabled: false
 
 FactoryBot/AttributeDefinedStatically:
   Enabled: false
 
-# After
-RSpec/RSpec/EmptyExampleGroup:
+# remains the same
+RSpec/EmptyExampleGroup:
   Enabled: false
 
+# After
 RSpec/Capybara/CurrentPathExpectation:
   Enabled: false
 
 RSpec/FactoryBot/AttributeDefinedStatically:
   Enabled: false
+
+# remains the same
+RSpec/EmptyExampleGroup:
+  Enabled: false
 ----
 
 https://github.com/rubocop-hq/rubocop/pull/8490[Learn more about this change].