Update README.md with GitHub actions Ubuntu CI nightly (#4979)

Signed-off-by: JesusPoderoso <jesuspoderoso@eprosima.com>
(cherry picked from commit 1409dc2)

# Conflicts:
#	README.md

README.md

@@ -19,9 +19,40 @@
 
 <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>
 
+<<<<<<< HEAD
 *eprosima Fast DDS* (formerly Fast RTPS) is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group). eProsima Fast DDS implements the RTPS (Real Time Publish Subscribe) protocol, which provides publisher-subscriber communications over unreliable transports such as UDP,
 as defined and maintained by the Object Management Group (OMG) consortium. RTPS is also the wire interoperability protocol defined for the Data Distribution
 Service (DDS) standard. *eProsima Fast DDS* expose an API to access directly the RTPS protocol, giving the user full access to the protocol internals.
+=======
+<div class="badges" align="center">
+    <a href="https://www.fiware.org/developers/catalogue/"><img alt="FIWARE Robotics" src="https://nexus.lab.fiware.org/static/badges/chapters/robotics.svg"/></a>
+    <a href="https://opensource.org/licenses/Apache-2.0"><img alt="License" src="https://img.shields.io/github/license/eProsima/Fast-DDS.svg"/></a>
+    <a href="https://github.com/eProsima/Fast-DDS/releases"><img alt="Releases" src="https://img.shields.io/github/v/release/eProsima/Fast-DDS?sort=semver"/></a>
+    <a href="https://github.com/eProsima/Fast-DDS/issues"><img alt="Issues" src="https://img.shields.io/github/issues/eProsima/Fast-DDS.svg"/></a>
+    <a href="https://github.com/eProsima/Fast-DDS/network/members"><img alt="Forks" src="https://img.shields.io/github/forks/eProsima/Fast-DDS.svg"/></a>
+    <a href="https://github.com/eProsima/Fast-DDS/stargazers"><img alt="Stars" src="https://img.shields.io/github/stars/eProsima/Fast-DDS.svg"/></a>
+    <a href="https://eprosima-fast-rtps.readthedocs.io"><img alt="Documentation badge" src="https://img.shields.io/readthedocs/eprosima-fast-rtps.svg"/></a>
+    <br>
+    <a href=""><img alt="Status" src="https://nexus.lab.fiware.org/static/badges/statuses/incubating.svg"/></a>
+    <a href="https://github.com/eProsima/Fast-DDS/actions/workflows/nightly-ubuntu-ci.yml"><img alt="Fast DDS Ubuntu CI (nightly)" src="https://github.com/eProsima/Fast-DDS/actions/workflows/nightly-ubuntu-ci.yml/badge.svg"/></a>
+    <a href="http://jenkins.eprosima.com:8080/view/Nightly/job/nightly_fastdds_sec_master_linux_aarch64/"><img alt="Linux arm64 ci" src="http://jenkins.eprosima.com:8080/job/nightly_fastdds_sec_master_linux_aarch64/lastCompletedBuild/badge/icon?subject=%20%20%20Linux-aarch64%20CI%20"/></a>
+    <a href="https://github.com/eProsima/Fast-DDS/actions/workflows/nightly-windows-ci.yml"><img alt="Windows ci" src="https://github.com/eProsima/Fast-DDS/actions/workflows/nightly-windows-ci.yml/badge.svg"/></a>
+    <a href="http://jenkins.eprosima.com:8080/job/nightly_fastdds_sec_master_mac"><img alt="Mac ci" src="http://jenkins.eprosima.com:8080/job/nightly_fastdds_sec_master_mac/lastCompletedBuild/badge/icon?subject=%20%20%20%20%20%20%20Mac%20CI%20"/></a>
+    <a href="http://jenkins.eprosima.com:8080/job/nightly_fastdds_coverage_linux"><img alt="Coverage" src="https://img.shields.io/jenkins/coverage/cobertura.svg?jobUrl=http%3A%2F%2Fjenkins.eprosima.com%3A8080%2Fjob%2Fnightly_fastdds_coverage_linux"/></a>
+</div>
+
+<br><br>
+
+<!-- TODO(eduponz): Remove this before releasing v3.0.0 -->
+> [!WARNING]
+> **In preparation for v3.0.0, Fast DDS' master branch is undergoing major changes entailing API breaks.**
+> **Until Fast DDS v3.0.0 is released, it is strongly advisable to use the latest stable branch, [2.14.x](https://github.com/eProsima/Fast-DDS/tree/2.14.x)**.
+
+*eprosima Fast DDS* is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group).
+eProsima Fast DDS implements the RTPS (Real Time Publish Subscribe) protocol, which provides publisher-subscriber communications over unreliable transports such as UDP, as defined and maintained by the Object Management Group (OMG) consortium.
+RTPS is also the wire interoperability protocol defined for the Data Distribution Service (DDS) standard.
+*eProsima Fast DDS* expose an API to access directly the RTPS protocol, giving the user full access to the protocol internals.
+>>>>>>> 1409dc245 (Update README.md with GitHub actions Ubuntu CI nightly (#4979))
 
 Some of the main features of this library are: