Solve 50+ cargo doc warnings (#24071)

Release Notes:

- N/A

crates/theme/src/settings.rs

@@ -425,7 +425,7 @@ impl BufferLineHeight {
 }
 
 impl ThemeSettings {
-    /// Returns the [AdjustedBufferFontSize].
+    /// Returns the buffer font size.
     pub fn buffer_font_size(&self) -> Pixels {
         Self::clamp_font_size(self.buffer_font_size)
     }