Use correct capitalization in service name
https://bugs.webkit.org/show_bug.cgi?id=106368

Reviewed by Andreas Kling.

* WebProcess/com.apple.WebProcess.sb.in:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139101 268f45cc-cd09-0410-ab3c-d52691b4dbfc