Fix Clippy for Rust 1.90 beta (#7826)

Fix Clippy for recently released Rust 1.90 beta. There may be more changes required when Rust 1.89 stable is released in a few days, but possibly not 🤞

slasher/src/config.rs

@@ -104,7 +104,7 @@ impl Config {
             Err(Error::ConfigInvalidZeroParameter {
                 config: self.clone(),
             })
-        } else if self.history_length % self.chunk_size != 0 {
+        } else if !self.history_length.is_multiple_of(self.chunk_size) {
             Err(Error::ConfigInvalidChunkSize {
                 chunk_size: self.chunk_size,
                 history_length: self.history_length,