bug #8601 Page creation: require profiler with --dev. (jlamur)

This PR was merged into the master branch.

Discussion
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Page creation: require profiler with --dev.

IMO, it's better to encourage to not have the profiler in production.

Commits
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38ed1f7 Page creation: require profiler with --dev.

Author: weaverryan

page_creation.rst

@@ -183,7 +183,7 @@ To use the web debug toolbar, just install it:
 
 .. code-block:: terminal
 
-    $ composer require profiler
+    $ composer require --dev profiler
 
 As soon as this finishes, refresh your page. You should see a black bar along the
 bottom of the page. You'll learn more about all the information it holds along the