chore: last small fix

Author: carlota-moh

src/connections/spec/video.md

@@ -32,7 +32,7 @@ All playback events share the same event properties that describe information ab
 | `content_pod_id`, `content_pod_ids`   |   String, Array[string]   | The Content Pod Id(s) of the video/videos playing or about to be played in the video player. **For [Video Playback Started](#video-playback-started) events only**, you should send the plural form with an Array of unique pod IDs. For all other playback events, you should send the singular form with the ID of the current content pod playing at the time of the event.          |
 | `ad_asset_id` | String, Array[string] | The Ad Asset Id(s) of the ad/ads playing or about to be played in the video player. **For [Video Playback Started](#video-playback-started) events only**, you should send an Array of unique ad asset IDs. For all other playback events, you should send a string with the ID of the current ad asset playing at the time of the event. |
 | `ad_pod_id`   | String, Array[string] | The Ad Pod Id(s) of the ad/ads playing or about to be played in the video player. **For [Video Playback Started](#video-playback-started) events only**, you should send an Array of unique ad pod IDs. For all other playback events, you should send a string with the ID of the current ad pod playing at the time of the event. |
-| `ad_type`     | Enum {`pre-roll`, `mid-roll`, `post-roll`} | The type of ad playing at the time of the event. Values can include `pre-roll`, `mid-roll`, and `post-roll`. |
+| `ad_type`     | Enum \{`pre-roll`, `mid-roll`, `post-roll`\} | The type of ad playing at the time of the event. Values can include `pre-roll`, `mid-roll`, and `post-roll`. |
 | `position`    | Integer         | The current index position **in seconds** of the playhead, including the duration of any ads seen (if available). If the playback is a livestream, check the documentation for relevant destinations for details on how to correctly pass the playhead position. |
 | `total_length`| Integer         | The total duration of the playback in seconds. This should include the duration of all your content and ad included in this playback session. For livestream playback, send `null`. |
 | `bitrate`     | Integer         | The current `kbps`.   |