Update Install YAML PHP extension title (laradock#1887)

miss change title

Author: ahkui

DOCUMENTATION/content/documentation/index.md

@@ -1601,7 +1601,7 @@ will set the clock back 1 day. See (https://github.com/wolfcw/libfaketime) for m
 
 
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-<a name="Install-Faketime"></a>
+<a name="Install-YAML"></a>
 ## Install YAML PHP extension in the php-fpm container
 YAML PHP extension allows you to easily parse and create YAML structured data. I like YAML because it's well readable for humans. See http://php.net/manual/en/ref.yaml.php and http://yaml.org/ for more info.