Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: Ib1a4013b0f2d0108393027de51b84e49bbb8cac6
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"