Update README.md

Author: errorfiathck

README.md

@@ -208,7 +208,13 @@ git clone https://github.com/errorfiathck/ssrf-exploit.git
 ```sh
 cd ssrf-exploit
 ```
-3. run the script as example:
+
+3. Once on your system, you'll need to install the Python dependencies.
+```sh
+pip3 install -r requirements.txt
+```
+
+5. run the script as example:
 ```sh
 python3 ssrf-exploition.py --help
 ```