fix clippy (#7302)

# Objective

- `cargo clippy` should work (except for clippy::type_complexity)

## Solution

- fix new clippy lints

crates/bevy_render/src/render_graph/node_slot.rs

@@ -115,7 +115,7 @@ impl From<&'static str> for SlotLabel {
 
 impl From<Cow<'static, str>> for SlotLabel {
     fn from(value: Cow<'static, str>) -> Self {
-        SlotLabel::Name(value.clone())
+        SlotLabel::Name(value)
     }
 }
 

crates/bevy_render/src/renderer/graph_runner.rs

@@ -115,7 +115,7 @@ impl RenderGraphRunner {
                     return Err(RenderGraphRunnerError::MissingInput {
                         slot_index: i,
                         slot_name: input_slot.name.clone(),
-                        graph_name: graph_name.clone(),
+                        graph_name,
                     });
                 }
             }