[Chore] Update README.md termination notice

Author: Linwenxuan04

README.md

@@ -32,6 +32,10 @@
 </tr>
 </table>
 
+## Termination Notice
+
+This Project has encounted missconduct, the central SignServer has been terminated temporarily.
+
 ## Out of Active Feature Requesting
 
 Lagrange.Core has completed nearly all the function and task scheduled by Linwenxuan05, so mostly enhance to the library would be concentrated to the repo for next.
@@ -97,4 +101,4 @@ https://sign.lagrangecore.org/api/sign
 
 Thanks for 外国热心网友 for Provision of Azure Servlet
 
-** Built-in SignServer is now provided, Enjoy! **
+** Built-in SignServer is now provided, Enjoy! **