Fix eProsima logo in README.md (#398)

Signed-off-by: Antón Casas <antoncasas@eprosima.com>

Author: 4ntn

README.md

@@ -10,7 +10,7 @@
 
 [![Docker Build Status](https://img.shields.io/docker/cloud/build/eprosima/micro-xrce-dds-client)](https://hub.docker.com/r/eprosima/micro-xrce-dds-client/)
 
-<a href="http://www.eprosima.com"><img src="https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcSd0PDlVz1U_7MgdTe0FRIWD0Jc9_YH-gGi0ZpLkr-qgCI6ZEoJZ5GBqQ" align="left" hspace="8" vspace="2" width="100" height="100" ></a>
+<a href="http://www.eprosima.com"><img src="docs/eprosima-logo.svg" align="left" hspace="8" vspace="2" width="100" height="100" ></a>
 
 *eProsima Micro XRCE-DDS* is a library implementing the [DDS-XRCE protocol](https://www.omg.org/spec/DDS-XRCE/About-DDS-XRCE/) as defined and maintained by the OMG, whose aim is to allow resource constrained devices such as microcontrollers to communicate with the [DDS](https://www.omg.org/spec/DDS/About-DDS/>) world as any other DDS actor would do.
 It follows a client/server paradigm and is composed by two libraries, the *Micro XRCE-DDS Client* and the *Micro XRCE-DDS Agent*. The *Micro XRCE-DDS Clients* are lightweight entities meant to be compiled on e**X**tremely **R**esource **C**onstrained **E**nvironments, while the *Micro XRCE-DDS Agent* is a broker which bridges the *Clients* with the DDS world.