Fix haml-lint rubocop style negation cops (#26057)

.haml-lint_todo.yml

 # This configuration was generated by
 # `haml-lint --auto-gen-config`
-# on 2023-07-17 15:30:11 -0400 using Haml-Lint version 0.48.0.
+# on 2023-07-18 09:57:52 -0400 using Haml-Lint version 0.48.0.
 # The point is for the user to remove these configuration records
 # one by one as the lints are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -15,7 +15,7 @@ linters:
   UnnecessaryStringOutput:
     enabled: false
 
-  # Offense count: 67
+  # Offense count: 65
   RuboCop:
     enabled: false
 

app/views/admin/reports/actions/preview.html.haml

@@ -32,7 +32,7 @@
       .fields-group
         = text_area_tag :text, nil, placeholder: t('admin.reports.summary.warning_placeholder')
 
-      - if !@report.other?
+      - unless @report.other?
         %p
           %strong= t('user_mailer.warning.reason')
           = t("user_mailer.warning.categories.#{@report.category}")

app/views/admin/reports/show.html.haml

@@ -92,7 +92,7 @@
             = t('simple_form.yes')
           - else
             = t('simple_form.no')
-    - if !@report.action_taken_by_account.nil?
+    - if @report.action_taken_by_account.present?
       .report-header__details__item
         .report-header__details__item__header
           %strong= t('admin.reports.action_taken_by')