corrections

Author: rutb327

mkdocs/docs/SUMMARY.md

@@ -34,7 +34,7 @@
     - [Release Notes](https://github.com/apache/iceberg-python/releases)
     - [Nightly Build](nightly-build.md)
 - [Code Reference](reference/)
-- [Nightly](https://py.iceberg.apache.org/nightly/)
+- [Nightly](../nightly/)
 
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