fix(gossipsub): fixed incorrect default values in ConfigBuilder

protocols/gossipsub/src/config.rs

@@ -768,13 +768,19 @@ impl ConfigBuilder {
         self
     }
 
-    /// The maximum byte size for each gossip (default is 2048 bytes).
+    /// The maximum byte size for each gossip (default is 65536 bytes).
+    /// 
+    /// ```
+    /// use libp2p_gossipsub::ConfigBuilder;
+    /// let mut config = ConfigBuilder::default();
+    /// assert_eq!(config.build().unwrap().max_transmit_size(), 65536);
+    /// ```
     pub fn max_transmit_size(&mut self, max_transmit_size: usize) -> &mut Self {
         self.config.protocol.default_max_transmit_size = max_transmit_size;
         self
     }
 
-    /// The maximum byte size for each gossip for a given topic. (default is 2048 bytes).
+    /// The maximum byte size for each gossip for a given topic. (default is 65536 bytes).
     pub fn max_transmit_size_for_topic(
         &mut self,
         max_transmit_size: usize,