Fix broken markdown table in README

Author: LilyFirefly

README.md

@@ -73,7 +73,7 @@ bundle = rustfluent.Bundle(
 | Name        | Type             | Description                                                                                                                                                              |
 |-------------|------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | `language`  | `str`            | [Unicode Language Identifier](https://unicode.org/reports/tr35/tr35.html#Unicode_language_identifier) for the language.                                                  |
-| `ftl_files` | `list[str | pathlib.Path]` | Full paths to the FTL files containing the translations. Entries in later files overwrite earlier ones.                                                                  |
+| `ftl_files` | `list[str \| pathlib.Path]` | Full paths to the FTL files containing the translations. Entries in later files overwrite earlier ones.                                                                  |
 | `strict`    | `bool`, optional | In strict mode, a `ParserError` will be raised if there are any errors in the file. In non-strict mode, invalid Fluent messages will be excluded from the Bundle. |
 
 #### Raises