fix: no markdown, no url

we don't have a URL to the comic itself,
only to the JSON API endpoint

and adding `("parse_mode", "MarkdownV2".to_string())`
would require one more allocation or refactoring the code

src/main.rs

@@ -172,10 +172,7 @@ async fn send_comic(cfg: Config, ctx: SenderCtx) -> Result<(), reqwest::Error> {
             ("photo", info.img),
             (
                 "caption",
-                format!(
-                    "*{}. [{}]({})*\n\n{}",
-                    ctx.comic_id, info.title, ctx.url, info.alt,
-                ),
+                format!("{}. {}\n\n{}", ctx.comic_id, info.title, info.alt),
             ),
         ])
         .send()