Fix cargo doc warning

src/exif.rs

@@ -472,7 +472,7 @@ impl ExifValue {
     }
 
     /// Check the ok status indicator.
-    /// After a to<Type> conversion, this indicator shows whether the conversion was successful.
+    /// After a `to<Type>` conversion, this indicator shows whether the conversion was successful.
     pub fn ok(&self) -> bool {
         if self.value.is_null() {
             return false;

src/webclient.rs

@@ -178,7 +178,7 @@ impl WebClient {
     ///
     /// returns true if readed successfully.
     /// # Note
-    /// If read failed, will clean all entries in the current [CookieJar]
+    /// If read failed, will clean all entries in the current [ManagedCookieJar]
     pub fn read_cookies(&self, file_name: &str) -> bool {
         let mut c = self.get_cookies_as_mut();
         let r = c.read(file_name);