Update README.md

Author: amitverma80

README.md

@@ -10,10 +10,10 @@ Solution to <a href="https://www.hackerrank.com/domains/sql?badge_type=sql">SQL<
 
 <table width="100%"> 
   <tr>
-    <th width="20%">Difficulty Level</th>
-    <th width="60%">Problem</th>
+    <th width="30%">Difficulty Level</th>
+    <th width="55%">Problem</th>
     <th width="10%">Max. Score</th>
-    <th width="10%">Solution</th>
+    <th width="5%">Solution</th>
   </tr>
  <tr>
     <td>Hard</td>