Update README.md

Author: onestardao

OS/README.md

@@ -177,7 +177,7 @@ No signup. No tracking. No ads. Virus-free. Pure logic.</em>
 
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 <details>
-  <summary>🌐 TXT OS – Cross-Platform Test Results (Tested: July 18, 2025) </summary>
+  <summary>🌐 TXT OS – Cross-Platform Test Results (Tested: October 10, 2025) </summary>
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