Bump tokio from 0.2.19 to 1.8.4 in /bot_news/bot

Bumps [tokio](https://github.com/tokio-rs/tokio) from 0.2.19 to 1.8.4.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-0.2.19...tokio-1.8.4)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

bot_news/bot/Cargo.lock

@@ -13,6 +13,6 @@ reqwest = {version = "0.10", features = ["blocking", "json"]}
 dotenv="0.15.0"
 teloxide = "0.2.0"
 log = "0.4.8"
-tokio = "0.2.11"
+tokio = "1.8.4"
 pretty_env_logger = "0.4.0"
 url = "1.5.1"