Update peps/pep-0825.rst

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: DEKHTIARJonathan

peps/pep-0825.rst

@@ -202,7 +202,7 @@ processing it, or after outputting it.
 A proposed JSON schema for the current format version is included in the
 Appendix of this PEP. Subsequent PEPs changing the metadata format will
 include updated versions of the schema. The schema is available in
-:ref:`0825-variant-json-schema`.
+:ref:`pep825-variant-json-schema`.
 
 
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