Fix some minor clippy lints from the future

crates/egui_extras/src/loaders.rs

@@ -16,7 +16,7 @@
 ///
 /// - If you just want to be able to load `file://` and `http://` URIs, enable the `all_loaders` feature.
 /// - The supported set of image formats is configured by adding the [`image`](https://crates.io/crates/image)
-/// crate as your direct dependency, and enabling features on it:
+///   crate as your direct dependency, and enabling features on it:
 ///
 /// ```toml,ignore
 /// egui_extras = { version = "*", features = ["all_loaders"] }

crates/egui_extras/src/table.rs

@@ -439,7 +439,7 @@ impl<'a> TableBuilder<'a> {
     }
 
     /// Reset all column widths.
-    pub fn reset(&mut self) {
+    pub fn reset(&self) {
         let state_id = self.ui.id().with(self.id_salt);
         TableState::reset(self.ui, state_id);
     }