Style update

Author: Sparks29032

CODE_OF_CONDUCT.rst CODE-OF-CONDUCT.rstCODE_OF_CONDUCT.rst renamed to CODE-OF-CONDUCT.rst

@@ -191,7 +191,7 @@ trying to commit again.
 
 Improvements and fixes are always appreciated.
 
-Before contributing, please read our `Code of Conduct <https://github.com/diffpy/diffpy.morph/blob/main/CODE_OF_CONDUCT.rst>`_.
+Before contributing, please read our `Code of Conduct <https://github.com/diffpy/diffpy.morph/blob/main/CODE-OF-CONDUCT.rst>`_.
 
 Contact
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