Use uppercase in title

OskarStark · OskarStark · commit 2f836b92d1fb · 2019-11-01T06:30:40.000+01:00
diff --git a/components/http_client.rst b/components/http_client.rst
@@ -847,7 +847,7 @@ Then you're ready to go::
     // wait for all remaining promises to resolve
     $httpClient->wait();
 
-Native PHP streams
+Native PHP Streams
 ~~~~~~~~~~~~~~~~~~
 
 .. versionadded:: 4.4
