Update README.md

Author: shahsad-kp

README.md

@@ -79,12 +79,12 @@ python3 main.py
 * `OWNER_ID` Must enter Your Telegram Id
 * `CHANNEL_ID` Your Channel ID eg:- -100xxxxxxxx
 * `ADMINS` Optional: A space separated list of user_ids of Admins, they can only create links
-* `START_MESSAGE` Optional: start message of bot, use HTML parsemode format
+* `START_MESSAGE` Optional: start message of bot, use HTML and <a href='https://github.com/shahsad-klr/File-Sharing-Bot/blob/main/README.md#start_message'>fillings</a>
 * `FORCE_SUB_CHANNEL` Optional: ForceSub Channel ID, leave 0 if you want disable force sub
 
 ### Extra Variables
 
-* `CUSTOM_CAPTION` put your Custom caption text if you want Setup Custom Caption, you can use HTML and fillings for formatting
+* `CUSTOM_CAPTION` put your Custom caption text if you want Setup Custom Caption, you can use HTML and <a href='https://github.com/shahsad-klr/File-Sharing-Bot/blob/main/README.md#custom_caption'>fillings</a> for formatting (only for documents)
 * `DISABLE_CHANNEL_BUTTON` Put True to Disable Channel Share Button, Default if False
 
 ### Fillings