Exclude uf2 files in VS Code (#18186)

.vscode/settings.json

@@ -6,7 +6,8 @@
     "files.exclude": {
         "**/.build": true,
         "**/*.hex": true,
-        "**/*.bin": true
+        "**/*.bin": true,
+        "**/*.uf2": true
     },
     "files.associations": {
         "*.h": "c",