update README and CHANGELOG

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [v0.12.1] - UNRELEASED
 
+### Minor breaking change
+
+- `source.log_level`.
+  - The README was wrongly still mentioning `silent` as a way to silent the logging. Actually `silent` was remapped to `info` since [v0.8.2](#v082---2022-11-18).
+  - Starting from this version, levels `silent` and `off` will cause an error. 
+  - The only supported log levels are `debug`, `info`, `warn`, `error`. The default level, `info`, is recommended for normal operation.
+
 ### Changed
 
 - Update to Go 1.22

README.md

@@ -195,8 +195,8 @@ With reference to the [GitHub Commit status API], the `POST` parameters (`state`
   See also: the optional `context` in the [put step](#the-put-step).
 
 - `log_level`:\
-  The log level (one of `debug`, `info`, `warn`, `error`, `silent`).\
-  Default: `info`.
+  The log level (one of `debug`, `info`, `warn`, `error`).\
+  Default: `info`, recommended for normal operation.
 
 - `github_hostname`:\
   GitHub hostname. This allows to post commit statuses to repositories hosted by GitHub Enterprise (GHE) instances. For example: github.mycompany.org will be expanded by cogito to https://github.mycompany.org/api/v3 \