[README] Add a simple Github Badge to track automated issues.
[README] Add a simple Github Badge to track automated issues.

This PR adds a simple Github Badge to our README to track automated issues created by the Github Actions bot.

Closes: #9293

libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,libra/libra,libra/libra,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core