Add BlackArch install command

Co-authored-by: Siddharth Dushantha <siddharth.dushantha@gmail.com>

docs/README.md

@@ -31,7 +31,8 @@
 | - | - | - |
 | PyPI | `pipx install sherlock-project` | `pip` may be used in place of `pipx` |
 | Docker | `docker pull sherlock/sherlock` | |
-| Debian family | `apt install sherlock` | Kali, Parrot, Deb Testing, Deb Sid |
+| Debian family | `apt install sherlock` | Kali, Parrot, Debian Testing and Sid |
+| BlackArch | `pacman -S sherlock` |  |
 | Homebrew | `brew install sherlock` | |
 
 PyPI and DockerHub images are mainaintenced by the Sherlock Project. Others are community supported.