[Content:Tools] Adding a2sv scanning tool

Author: sundowndev

README.md

@@ -119,6 +119,7 @@ Information Gathering tools allows you to collect host metadata about services a
 | [KnockMail](https://github.com/4w4k3/KnockMail)      | **Python** | `Linux/Windows/macOS` | Check if email address exists. |
 | [Photon](https://github.com/s0md3v/Photon)      | **Python** | `Linux/Windows/macOS` | Crawler which is incredibly fast and extracts urls, emails, files, website accounts and much more. |
 | [Rapidscan](https://github.com/skavngr/rapidscan)      | **Python** | `Linux/Windows/macOS` | The Multi-Tool Web Vulnerability Scanner. |
+| [a2sv](https://github.com/hahwul/a2sv)      | **Python** | `Linux/Windows/macOS` | Auto Scanning to SSL Vulnerability. |
 
 #### :lock: Password Attacks