scripted-diff: Replace GetDataDir(true) calls with gArgs.GetDataDirNet() calls

-BEGIN VERIFY SCRIPT-
git ls-files -- 'src' ':(exclude)src/util/system.h' ':(exclude)src/util/system.cpp' | xargs sed -i 's/GetDataDir(true)/gArgs.GetDataDirNet()/g';
-END VERIFY SCRIPT-

src/qt/bitcoin.cpp

@@ -536,7 +536,7 @@ int GuiMain(int argc, char* argv[])
     if (!Intro::showIfNeeded(did_show_intro, prune_MiB)) return EXIT_SUCCESS;
 
     /// 6. Determine availability of data directory and parse bitcoin.conf
-    /// - Do not call GetDataDir(true) before this step finishes
+    /// - Do not call gArgs.GetDataDirNet() before this step finishes
     if (!CheckDataDirOption()) {
         InitError(strprintf(Untranslated("Specified data directory \"%s\" does not exist.\n"), gArgs.GetArg("-datadir", "")));
         QMessageBox::critical(nullptr, PACKAGE_NAME,