Fix unnecesary space in README

Signed-off-by: Víctor Mayoral Vilches <[email protected]>

README.md

@@ -59,7 +59,6 @@ The *Robot Hacking Manual* (`RHM`) is an introductory series about cybersecurity
   - <ins>Hardening</ins>
     - [Tutorial 1: A study of container technologies](2_writeups/4_other/hardening/tutorial1/README.md)
 - **Talks**:
-
   - <ins>2016</ins>
     - [Securing ROS over the wire, in the graph, and through the kernel](https://vimeo.com/187705073), ROSCon 2016
   - <ins>2017</ins>
@@ -89,5 +88,4 @@ The *Robot Hacking Manual* (`RHM`) is an introductory series about cybersecurity
     - Breaking ROS 2 security assumptions: Targeting the top 6 DDS implementations (*to appear*), ROS-Industrial Conference 2021
 
 
-
 [^0]: Read on what a security-first approach in [here](https://www.darkreading.com/edge-articles/a-security-first-approach-to-devops).