fixing typos

Author: notEduardo

README.md

@@ -186,7 +186,7 @@ Below are the available endpoints for each table.
   {
     "ip_address": "string",
     "wallet_address": "string",
-    "github_username": "string"
+    "github_userid": "string"
   }
   ```
 - **Curl Command**:

src/routes/rateLimitRoute.js

@@ -59,7 +59,7 @@ router.post('/rate-limits-combo', async (req, res, next) => {
 
     // Validate the input
     if (!ip_address || !wallet_address) {
-        return res.status(400).json({ message: 'All fields (ip_address, wallet_address, github_username) are required.' });
+        return res.status(400).json({ message: 'All fields (ip_address, wallet_address) are required.' });
     }
 
     try {