Fix broken setuptools-scm link

Author: edgarrmondragon

source/discussions/setup-py-deprecated.rst

@@ -115,7 +115,7 @@ A possible replacement solution (among others) is to rely on setuptools-scm_:
 
 * ``python -m setuptools_scm``
 
-.. _setuptools-scm: https://setuptools-scm.readthedocs.io/en/latest/usage/#as-cli-tool
+.. _setuptools-scm: https://setuptools-scm.readthedocs.io/en/latest/usage.html#as-cli-tool
 
 
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