fix documentation error in README.md
@@ -99,7 +99,7 @@ Run `xh help` for more detailed information.
- `@` for including files in multipart requests e.g `picture@hello.jpg` or `picture@hello.jpg;type=image/jpeg;filename=goodbye.jpg`.
- `:` for adding or removing headers e.g `connection:keep-alive` or `connection:`.
- `;` for including headers with empty values e.g `header-without-value;`.
-- `=@`/`:=@` for setting the request body's JSON or form fields from a file (`=` for strings and `:=` for other JSON types).
+- `=@`/`:=@` for setting the request body's JSON or form fields from a file (`=@` for strings and `:=@` for other JSON types).
The request body can also be read from standard input, or from a file using `@filename`.
