Update data/reusables/dependabot/supported-package-managers.md

Co-authored-by: Copilot <[email protected]>

Author: Sharra-writes

data/reusables/dependabot/supported-package-managers.md

@@ -140,7 +140,7 @@ pnpm is supported for {% data variables.product.prodname_dependabot_version_upda
 
 #### poetry
 
-The PEP 621 `project` section isn't currently supported for `poetry`
+The PEP 621 `project` section isn't currently supported for `poetry`.
 
 #### pub