[ci] Fix clippy warnings for 1.47.0

src/descriptor/policy.rs

@@ -140,13 +140,11 @@ pub enum SatisfiableItem {
 
 impl SatisfiableItem {
     pub fn is_leaf(&self) -> bool {
-        match self {
-            SatisfiableItem::Thresh {
-                items: _,
-                threshold: _,
-            } => false,
-            _ => true,
-        }
+        !matches!(self,
+        SatisfiableItem::Thresh {
+            items: _,
+            threshold: _,
+        })
     }
 
     pub fn id(&self) -> String {

src/wallet/export.rs

@@ -133,7 +133,7 @@ impl WalletExport {
                     .into_iter()
                     .map(|tx| tx.height.unwrap_or(0))
                     .collect::<Vec<_>>();
-                heights.sort();
+                heights.sort_unstable();
 
                 *heights.last().unwrap_or(&0)
             }