fix typo in filename mentioning "password.yaml" to "passwords.yaml"

Small typo fix

wrong: password.yaml right: passwords.yaml

Pre-launch Checklist

[x] I read the Contribute page and followed the process outlined there for submitting PRs.
[x] This update contains only one single feature or bug fix and nothing else. (If you are submitting multiple fixes, please make multiple PRs.)
[x] I read and followed the Dart Style Guide and formatted the code with dart format.
[ ] I listed at least one issue that this PR fixes in the description above.
[ ] I updated/added relevant documentation (doc comments with ///), and made sure that the documentation follows the same style as other Serverpod documentation. I checked spelling and grammar.
[ ] I added new tests to check the change I am making.
[x] All existing and new tests are passing.
[ ] Any breaking changes are documented below.

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No breaking changes