Fix twine check

ci/requirements.txt

@@ -1,6 +1,6 @@
 c2cciutils[checks,publish]==1.4.16
+importlib-metadata<8.0.0 # issue with twine, see: https://github.com/python/importlib_metadata/issues/492
 poetry-dynamic-versioning[plugin]==0.21.5
-poetry-plugin-export==1.3.1
 setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
 certifi>=2022.12.7 # not directly required, pinned by Snyk to avoid a vulnerability
 cryptography>=42.0.2 # not directly required, pinned by Snyk to avoid a vulnerability