ci: upgrade twine

Twine is the library used to deploy dbt-materialize to PyPi. Recent
versions are broken with missing metadata keys. The issue has been
resolved in the latest release.

Example failure: https://buildkite.com/materialize/deploy/builds/15079#0190cc52-c16a-4ea4-8020-e1df5daed947
Twine issue: pypa/twine#977

ci/builder/requirements.txt

@@ -52,7 +52,7 @@ semver==3.0.0
 shtab==1.5.8
 sqlparse==0.5.0
 toml==0.10.2
-twine==4.0.2
+twine==5.1.1
 types-Markdown==3.6.0.20240316
 types-pkg-resources==0.1.3
 types-prettytable==3.4.2.3