fixed file extension issue with companies logo

Author: mrsaeeddev

README.md

@@ -5,7 +5,7 @@
     <br/>
     <br/>
 
-  <img src="https://raw.githubusercontent.com/mrsaeeddev/free-ai-resources/master/companies.png">
+  <img src="https://raw.githubusercontent.com/mrsaeeddev/free-ai-resources/master/companies.jpg">
 
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