Fix Image size (#453)

Fix the image size on website and added learnweb3 Github link

docs/courses/learnweb3.md

@@ -6,8 +6,15 @@ sidebar_position: 3
 
 [LearnWeb3](https://learnweb3.io/) is an online educational platform that provides free and comprehensive training on web3 technologies to both new and experienced web2 developers. It is recognized as the best and fastest-growing platform for learning about web3, which includes blockchain, decentralized applications, smart contracts, and other related technologies.
 
-[![Twitter](https://skillicons.dev/icons?i=twitter)](https://twitter.com/LearnWeb3DAO)
-[![Discord](https://skillicons.dev/icons?i=discord)](https://discord.gg/w3q4vwc3Az)
-
-
+<p align="left">
+  <a href="https://twitter.com/LearnWeb3DAO">
+    <img height='30' src="https://skillicons.dev/icons?i=twitter" />
+  </a>
+  <a href="https://discord.gg/w3q4vwc3Az">
+    <img height='30' src="https://skillicons.dev/icons?i=discord" />
+   </a>
+  <a href="https://github.com/LearnWeb3DAO">
+    <img height='30' src="https://skillicons.dev/icons?i=github" />
+   </a>
+</p>