Generators: Update descriptions

Follow-up to #1187

lib/generators/suspenders/accessibility_generator.rb

@@ -4,7 +4,11 @@ class AccessibilityGenerator < Rails::Generators::Base
       include Suspenders::Generators::APIAppUnsupported
 
       desc <<~MARKDOWN
-        Installs capybara_accessibility_audit and capybara_accessible_selectors"
+        Uses [capybara_accessibility_audit][] and [capybara_accessible_selectors][] to
+        encourage and enforce accessibility best practices.
+
+        [capybara_accessibility_audit]: https://github.com/thoughtbot/capybara_accessibility_audit
+        [capybara_accessible_selectors]: https://github.com/citizensadvice/capybara_accessible_selectors
       MARKDOWN
 
       def add_capybara_gems

lib/generators/suspenders/advisories_generator.rb

@@ -3,10 +3,10 @@ module Generators
     class AdvisoriesGenerator < Rails::Generators::Base
       source_root File.expand_path("../../templates/advisories", __FILE__)
       desc <<~MARKDOWN
-        Show security advisories during development.
-
-        Uses the `bundler-audit` gem to update the local security database and
+        Uses the [bundler-audit][] to update the local security database and
         show any relevant issues with the app's dependencies via a Rake task.
+
+        [bundler-audit]: https://github.com/rubysec/bundler-audit
       MARKDOWN
 
       def add_bundler_audit

lib/generators/suspenders/ci_generator.rb

@@ -6,7 +6,10 @@ class CiGenerator < Rails::Generators::Base
 
       source_root File.expand_path("../../templates/ci", __FILE__)
       desc <<~MARKDOWN
-        Creates CI files for GitHub Actions
+        Uses [GitHub Actions][] for CI, and [Dependabot][] for dependency updates.
+
+        [GitHub Actions]: https://docs.github.com/en/actions
+        [Dependabot]: https://docs.github.com/en/code-security/dependabot/working-with-dependabot
       MARKDOWN
 
       def ci_files

lib/generators/suspenders/email_generator.rb

@@ -3,13 +3,17 @@ module Generators
     class EmailGenerator < Rails::Generators::Base
       source_root File.expand_path("../../templates/email", __FILE__)
       desc <<~MARKDOWN
-        Intercepts emails in non-production environments by setting `INTERCEPTOR_ADDRESSES`.
+        [Intercept][] emails in non-production environments by setting `INTERCEPTOR_ADDRESSES`.
 
         ```sh
         INTERCEPTOR_ADDRESSES="[email protected],[email protected]" bin/rails s
         ```
 
-        Configures `default_url_options` in `test` and `development`.
+        Configuration can be found at `config/initializers/email_interceptor.rb`.
+
+        Interceptor can be found at `app/mailers/email_interceptor.rb`.
+
+        [Intercept]: https://guides.rubyonrails.org/action_mailer_basics.html#intercepting-emails
       MARKDOWN
 
       def create_email_interceptor