message: Mention `[patch]` config in "Overriding Dependencies"
diff: @@ -266,6 +266,12 @@ git = 'https://github.com/example/baz'
  baz = { git = 'https://github.com/example/patched-baz', branch = 'my-branch' }
  ```
  +> **Note**: The `[patch]` table can also be specified as a [configuration
  +> option](config.md), such as in a `.cargo/config.toml` file or a CLI option
  +> like `--config 'patch.crates-io.rand.path="rand"'`. This can be useful for
  +> local-only changes that you don't want to commit, or temporarily testing a
  +> patch.
  +
  The `[patch]` table is made of dependency-like sub-tables. Each key after
  `[patch]` is a URL of the source that is being patched, or the name of a
  registry. The name `crates-io` may be used to override the default registry
  