Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -35,7 +35,7 @@
 | country        | Country code from which the channel is transmitted. A list of all supported countries and their codes can be found in [data/countries.csv](data/countries.csv)                                                    | Required | `CN`                           |
 | subdivision    | Code of the subdivision (e.g., provinces or states) from which the broadcast is transmitted. A list of all supported subdivisions and their codes can be found in [data/subdivisions.csv](data/subdivisions.csv). | Optional | `CN-AH`                        |
 | city           | The name of the city in English from which the channel is broadcast. May contain any characters except `,` and `"`.                                                                                               | Optional | `Hefei`                        |
-| broadcast_area | List of codes describing the broadcasting area of the channel. Any combination of `r/<region_code>`, `c/<country_code>`, `s/<subdivision_code>`.                                                                  | Required | `s/CN-AH`                      |
+| broadcast_area | List of codes describing the broadcasting area of the channel separated by `;`. Any combination of `r/<region_code>`, `c/<country_code>`, `s/<subdivision_code>`.                                                                  | Required | `s/CN-AH`                      |
 | languages      | List of languages in which the channel is broadcast separated by `;`. A list of all supported languages and their codes can be found in [data/languages.csv](data/languages.csv).                                 | Required | `zho`                          |
 | categories     | List of categories to which this channel belongs separated by `;`. A list of all supported categories can be found in [data/categories.csv](data/categories.csv).                                                 | Optional | `general`                      |
 | is_nsfw        | Indicates whether the channel broadcasts adult content (`TRUE` or `FALSE`).                                                                                                                                       | Required | `FALSE`                        |