Replace usage of SpecialPage::getTitle with getPageTitle

Was deprecated in 1.23, see Icdcf5d5295ef5e7f08b1d403e0c123f78738fd40

Change-Id: Ie32a41cb0d3d3961ab47728612bd5f5166b47334
Merge "Replace usage of SpecialPage::getTitle with getPageTitle"