Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: Icf6e063c644731f00f9b4dab89f96ec6241b40e0
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"