docs: use absolute URL for README image

Author: failfmi

README.md

@@ -2,7 +2,7 @@
 
 Gimlet is a VSCode Extension that makes Solana smart contract debugging seamless, automated, and fully integrated into the VS Code experience.
 
-![debugger](assets/vscode-debugger.png)
+![debugger](https://raw.githubusercontent.com/LimeChain/gimlet/main/assets/vscode-debugger.png)
 
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