Update README.md

Author: Humbedooh

README.md

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 This repository contains the configuration directives and KEYS files for ASF projects
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+Each project has its own directory, each containing a `KEYS` file (for release signing keys) and a `settings.yaml` file for distribution policy settings.
+These settings can be updated by projects through the artifacts.apache.org web interface, or manually by the Infrastructure team through this repository.
+
+Changes are automatically synced to/from this repository.