Set SS58 prefix to 4450 for Ğ1 network

As it's merged in the SS58 registry:

https://github.com/paritytech/ss58-registry/pull/102

runtime/g1/src/parameters.rs

@@ -28,7 +28,7 @@ parameter_types! {
     pub BlockWeights: frame_system::limits::BlockWeights = block_weights(2 * WEIGHT_PER_SECOND, NORMAL_DISPATCH_RATIO);
     pub BlockLength: frame_system::limits::BlockLength = frame_system::limits::BlockLength
         ::max_with_normal_ratio(5 * 1024 * 1024, NORMAL_DISPATCH_RATIO);
-    pub const SS58Prefix: u16 = 3682;
+    pub const SS58Prefix: u16 = 4450;
 }
 
 /*************/