doc: fix

README.md

@@ -47,7 +47,7 @@ impl<'a> DhcpConfig<'a> {
     pub fn set_filename(&mut self, filename: &str) {
         self.enable_netboot();
         self.get_lan_dhcpd().filename = Some(filename.to_string());
-    },
+    }
     ...
 ```
 
@@ -74,7 +74,7 @@ impl DhcpServer for OPNSenseFirewall {
         }
 
         Ok(())
-    },
+    }
     ...
 ```
 
@@ -85,7 +85,7 @@ impl DhcpServer for DummyInfra {
     ...
     async fn set_filename(&self, _filename: &str) -> Result<(), ExecutorError> {
         unimplemented!("{}", UNIMPLEMENTED_DUMMY_INFRA)
-    },
+    }
     ...
 ```
 
@@ -143,6 +143,6 @@ impl DhcpInterpret {
             format!(
                 "Dhcp Interpret Set next boot to [{:?}], boot_filename to [{:?}], filename to [{:?}]",
                 self.score.boot_filename, self.score.boot_filename, self.score.filename
-            ),
+            )
             ...
 ```