Update README.md

README.md

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 </details>
 
 <details>
-<summary markdown="span"> Umbrel LXC </summary>
+<summary markdown="span"> 🔸Umbrel LXC </summary>
 
 <p align="center"><img src="https://uploads-ssl.webflow.com/62966b49981ba146f4842f45/62966b49981ba15b44842fe4_umbrel-logo-compact-purple.svg" height="100"/></p>