Add check for XML API to PR template (#4658) (#4661)

* Add check for XML API to PR template (#4658)

Signed-off-by: EduPonz <eduardoponz@eprosima.com>
(cherry picked from commit 5eeee69)

# Conflicts:
#	.github/pull_request_template.md

* Refs #20703: Fix conflicts

Signed-off-by: Mario Dominguez <mariodominguez@eprosima.com>

---------

Signed-off-by: Mario Dominguez <mariodominguez@eprosima.com>
Co-authored-by: Eduardo Ponz Segrelles <eduardoponz@eprosima.com>
Co-authored-by: Mario Dominguez <mariodominguez@eprosima.com>

.github/pull_request_template.md

@@ -1,7 +1,7 @@
 <!-- Provide a general summary of your changes in the Title above -->
 <!-- It must be meaningful and coherent with the changes -->
 
-<!-- 
+<!--
     If this PR is still a Work in Progress [WIP], please open it as DRAFT.
     Please consider if any label should be added to this PR.
     If no code has been changed, please add `skip-ci` label.
@@ -10,6 +10,7 @@
 -->
 
 ## Description
+
 <!--
     Describe changes in detail.
     This includes depicting the context, use case or current behavior and describe the proposed changes.
@@ -29,20 +30,27 @@
 <!-- This PR depends on #(PR) and must be merged after that one. -->
 
 ## Contributor Checklist
+
+<!--
+    - If any of the elements of the following checklist is not applicable, substitute the checkbox [ ] by _N/A_
+    - If any of the elements of the following checklist is not fulfilled on purpose, please provide a reason and substitute the checkbox with ❌ or __NO__.
+-->
+
 - [ ] Commit messages follow the project guidelines. <!-- External contributors should sign the DCO. Fast DDS developers must also refer to the internal Redmine task. -->
 - [ ] The code follows the style guidelines of this project. <!-- Please refer to the [Quality Declaration](https://github.com/eProsima/Fast-DDS/blob/master/QUALITY.md#linters-and-static-analysis-4v) for more information. -->
 - [ ] Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added. <!-- Blackbox tests checking the new functionality are required. Changes that add/modify public API must include unit tests covering all possible cases. In case that no tests are provided, please justify why. -->
 - [ ] Any new/modified methods have been properly documented using Doxygen. <!-- Even internal classes, and private methods and members should be documented, not only the public API. -->
-- [ ] Fast DDS test suite has been run locally. <!-- Please provide the platform/architecture where the test suite has been run. In case that only some tests are run, please provide the list (unit test, blackbox Fast DDS PIM API, blackbox FastRTPS API, etc.) -->
+- [ ] Any new configuration API has an equivalent XML API (with the corresponding XSD extension) <!-- C++ configurable parameters should also be configurable using XML files. -->
 - [ ] Changes are ABI compatible. <!-- Bug fixes should be ABI compatible if possible so a backport to previous affected releases can be made. -->
 - [ ] Changes are API compatible. <!-- Public API must not be broken within the same major release. -->
 - [ ] Documentation builds and tests pass locally. <!-- Check there are no typos in the Doxygen documentation. -->
 - [ ] New feature has been added to the `versions.md` file (if applicable).
 - [ ] New feature has been documented/Current behavior is correctly described in the documentation. <!-- Please uncomment following line with the corresponding PR to the documentation project: -->
-<!-- Related documentation PR: eProsima/Fast-DDS-docs# (PR) -->
-
+    <!-- - Related documentation PR: eProsima/Fast-DDS-docs#(PR) -->
+- [ ] Applicable backports have been included in the description.
 
 ## Reviewer Checklist
+
 - [ ] The PR has a milestone assigned.
 - [ ] The title and description correctly express the PR's purpose.
 - [ ] Check contributor checklist is correct.