fix: use pango markup for consistent formatting in format and tooltip-format

src/modules/disk.cpp

@@ -81,7 +81,7 @@ auto waybar::modules::Disk::update() -> void {
     if (config_["tooltip-format"].isString()) {
       tooltip_format = config_["tooltip-format"].asString();
     }
-    label_.set_tooltip_text(fmt::format(
+    label_.set_tooltip_markup(fmt::format(
         fmt::runtime(tooltip_format), stats.f_bavail * 100 / stats.f_blocks, fmt::arg("free", free),
         fmt::arg("percentage_free", stats.f_bavail * 100 / stats.f_blocks), fmt::arg("used", used),
         fmt::arg("percentage_used", percentage_used), fmt::arg("total", total),
@@ -112,4 +112,4 @@ float waybar::modules::Disk::calc_specific_divisor(std::string divisor) {
   } else {  // default to Bytes if it is anything that we don't recongnise
     return 1.0;
   }
-}
+}