Markdown links not rendered properly in a media gallery captions

[rukavina]

Checklist

• [x] I am reporting an issue in existing functionality that does not work as intended
• [x] I've searched for existing issues

Description

When sending a media gallery message via bot API with markdownv2 captions, links are not clickable and not rendered as links. The same messages are working properly in Android clients (ios is not working either).

Expected Behavior

Markdown inline links should be clickable and opening URL after a confirmation.

Actual Behavior

Links are not clickable.

Steps to Reproduce

1. You need to have a bot
2. Submit CURL request, make sure to replace vars
3. CURL

   
   curl -X POST "https://api.telegram.org/bot{BOT_TOKEN}/sendMediaGroup" \
   -H "accept: application/json" \
   -H "Content-Type: application/json" \
   -d @- << EOF

{ "media": [ { "type": "photo", "caption": "This is markdown text1 with a link Link 1", "media": "https://www.alphashooters.com/wp-content/uploads/2019/01/sony-sel85f18-gsd-puppy-DSC00116-1300px.jpg", "parse_mode": "MarkdownV2" }, { "type": "photo", "caption": "This is markdown text2 with a link Link 2", "media": "https://www.cameraegg.org/wp-content/uploads/2015/06/canon-powershot-g3-x-sample-images-1.jpg", "parse_mode": "MarkdownV2" } ], "chat_id": "{RECEIVER_ID}" } EOF

### Screenshots and Videos 
https://i.ibb.co/bBxkwCX/telegram-link-issue.jpg

### Environment
**Browser:** `Chrome 81`

[stha]

👍

In general, no markdown seems to work in media captions at all. Its not limited to links.

[mohsen121314]

tanx

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