docs: say what was actually checked about the adopters

The claim was "Used by developers and organizations worldwide in their
production workflows", under a heading reading "Trusted by developers
worldwide".

The organizations were verified by hand, at organization level — these
orgs have repositories that run Commit Check. Which repositories was not
pinned down, so "in their production workflows" claimed more than that:
a repository can be a demo, a template or an experiment. It was also the
least load-bearing part of the sentence, since eighteen logos carry the
point on their own.

What was verified is the stronger claim anyway, because a reader can
check it — the dependents graph is right there, and "production" is not
falsifiable. So the section says that instead, and the dependents link
moves into the sentence rather than dangling after the logo grid.

Dropping "worldwide" from the heading also stops it and the sentence
below repeating the same two words back to back.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01U9zFxq8V4qxG4aMzJhGBFn

Author: claude

docs/index.md

@@ -240,11 +240,12 @@ graph LR
 
 </div>
 
-## Trusted by developers worldwide
+## Used by
 
 <div class="trusted-by" markdown>
 
-**Used by developers and organizations worldwide in their production workflows.**
+**Commit Check runs in repositories across these organizations, and in
+[many more](https://github.com/commit-check/commit-check-action/network/dependents).**
 
 <div class="logo-grid">
   <div class="logo-item">
@@ -323,8 +324,6 @@ graph LR
 
 </div>
 
-And [many more](https://github.com/commit-check/commit-check-action/network/dependents).
-
 ---
 
 <div class="community-section" markdown>