Add Centreon Web 2.7.12 release note

doc/en/release_notes/centreon-2.7/centreon-2.7.12.rst

+###############
+Centreon 2.7.12
+###############
+
+The 2.7.12 release for Centreon Web is now available for `download <https://download.centreon.com>`_.
+The full release notes for 2.7.12 follow.
+
+******
+Notice
+******
+
+If you are upgrading from a version prior to 2.7.0, make sure to go through all the release notes available
+`here <http://documentation.centreon.com/docs/centreon/en/latest/release_notes/index.html>`_.
+
+Bug Fixes
+=========
+
+* [CLAPI] Several bugs on HG / CG when export is filtered #5297 PR #5320
+* [CLAPI] fix clapi ldap contact import
+* Unable to load public custom view - No Layout... #5449
+* Impossible to acknowledge several object from custom views #5420
+* Security: avoid external command shell injection in comment
+

doc/en/release_notes/centreon-2.7/index.rst

@@ -19,3 +19,4 @@ Please find here the release notes dedicated to the last 2.7.x version of Centre
     centreon-2.7.9
     centreon-2.7.10
     centreon-2.7.11
+    centreon-2.7.12

doc/fr/release_notes/centreon-2.7/centreon-2.7.12.rst

+###############
+Centreon 2.7.12
+###############
+
+The 2.7.12 release for Centreon Web is now available for `download <https://download.centreon.com>`_.
+The full release notes for 2.7.12 follow.
+
+******
+Notice
+******
+
+If you are upgrading from a version prior to 2.7.0, make sure to go through all the release notes available
+`here <http://documentation.centreon.com/docs/centreon/en/latest/release_notes/index.html>`_.
+
+Bug Fixes
+=========
+
+* [CLAPI] Several bugs on HG / CG when export is filtered #5297 PR #5320
+* [CLAPI] fix clapi ldap contact import
+* Unable to load public custom view - No Layout... #5449
+* Impossible to acknowledge several object from custom views #5420
+* Security: avoid external command shell injection in comment
+

doc/fr/release_notes/centreon-2.7/index.rst

@@ -19,3 +19,4 @@ Please find here the release notes dedicated to the last 2.7.x version of Centre
     centreon-2.7.9
     centreon-2.7.10
     centreon-2.7.11
+    centreon-2.7.12