Bump version to v2.6.0 (#348)

Signed-off-by: Eduardo Ponz <eduardoponz@eprosima.com>

Author: EduPonz

.github/workflows/mirror.yml

@@ -12,7 +12,6 @@ jobs:
       fail-fast: false
       matrix:
         dest_branch:
-          - '2.5.x'
           - '2.6.x'
     steps:
     - name: Mirror action step

docs/conf.py

@@ -379,9 +379,9 @@ def configure_doxyfile(
 # built documents.
 #
 # The short X.Y version.
-version = u'2.5.1'
+version = u'2.6.0'
 # The full version, including alpha/beta/rc tags.
-release = u'2.5.1'
+release = u'2.6.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.