Fix clippy lint issue (#808)

- [x] no changelog update needed

Author: corwinkuiper

agb-hashmap/src/lib.rs

@@ -898,7 +898,7 @@ where
         }
 
         self.iter()
-            .all(|(key, value)| other.get(key).map_or(false, |v| *value == *v))
+            .all(|(key, value)| other.get(key).is_some_and(|v| *value == *v))
     }
 }