Update AutoBuild README.md

buildroot/share/vscode/AutoBuildMarlin/README.md

   ![](https://github.com/MarlinFirmware/Marlin/raw/bugfix-2.0.x/buildroot/share/vscode/AutoBuildMarlin/img/B_small.png)|Start **PIO Build** to test your Marlin build
   ![](https://github.com/MarlinFirmware/Marlin/raw/bugfix-2.0.x/buildroot/share/vscode/AutoBuildMarlin/img/C_small.png)|Start **PIO Clean** to delete old build files
   ![](https://github.com/MarlinFirmware/Marlin/raw/bugfix-2.0.x/buildroot/share/vscode/AutoBuildMarlin/img/U_small.png)|Start **PIO Upload** to install Marlin on your board
-  ![](https://github.com/MarlinFirmware/Marlin/raw/bugfix-2.0.x/buildroot/share/vscode/AutoBuildMarlin/img/Ut_small.png)|Start **PIO Upload (traceback)** to install Marlin with debugging
+  ![](https://github.com/MarlinFirmware/Marlin/raw/bugfix-2.0.x/buildroot/share/vscode/AutoBuildMarlin/img/T_small.png)|Start **PIO Upload (traceback)** to install Marlin with debugging