Exclude signature files from `twine` upload (#1071)

diff --git a/mkdocs/docs/how-to-release.md b/mkdocs/docs/how-to-release.md
index 59ad697..9534b1f 100644
--- a/mkdocs/docs/how-to-release.md
+++ b/mkdocs/docs/how-to-release.md
@@ -230,7 +230,9 @@
 The latest version can be pushed to PyPi. Check out the Apache SVN and make sure to publish the right version with `twine`:
 
 ```bash
-twine upload /tmp/iceberg-dist-release/pyiceberg-<VERSION>/*
+svn checkout https://dist.apache.org/repos/dist/release/iceberg /tmp/iceberg-dist-release/
+cd /tmp/iceberg-dist-release/pyiceberg-${VERSION_WITHOUT_RC}
+twine upload pyiceberg-*.whl pyiceberg-*.tar.gz
 ```
 
 Send out an announcement on the dev mail list: