Adjust list of reassurance organizations to those we can use

- Use Siemens, Chorus, KnowBe4, Wish, & Hotjar
- Use opacity of 50% (of black) in place of the gray-400 color; this
  also plays into future iterations where we'll have logo images at 50%
  opacity
- Use a bit more margin to separate into a row of 3 and a row of 2
  rather than having a row of 4 and a row of 1

ee/app/views/trial_registrations/_reassurances.html.haml

@@ -10,4 +10,9 @@
       %span.gl-mr-3.gl-text-green-400= sprite_icon 'check-circle', css_class: 'gl-icon'
       = value_prop
 
-%p.gl-mb-3.gl-text-gray-400.gl-font-sm.gl-line-height-24= s_('InProductMarketing|Used by more than 100,000 organizations from around the globe.')
+%p.gl-mb-3.gl-text-gray-400.gl-font-sm.gl-line-height-24= s_('InProductMarketing|Used by more than 100,000 organizations from around the globe:')
+
+%ul.gl-display-flex.gl-flex-wrap.gl-pl-0.gl-font-sm.gl-font-weight-bold.gl-opacity-5
+  - ['Siemens', 'Chorus', 'KnowBe4', 'Wish', 'Hotjar'].each do |company|
+    %li.gl-display-flex.gl-align-items-center.gl-min-w-8.gl-h-8.gl-mr-6
+      = company

locale/gitlab.pot

@@ -17178,7 +17178,7 @@ msgstr ""
 msgid "InProductMarketing|Use GitLab CI/CD"
 msgstr ""
 
-msgid "InProductMarketing|Used by more than 100,000 organizations from around the globe."
+msgid "InProductMarketing|Used by more than 100,000 organizations from around the globe:"
 msgstr ""
 
 msgid "InProductMarketing|Very difficult"