docs: added mention how to change default integration templates.

docs/integrations/jira.rst

@@ -25,3 +25,10 b' transition status id in the *Workflow* s'
 
 Once you have the transition status id, you can create a JIRA integration
 as outlined in :ref:`creating-integrations`.
+
+
+.. note::
+
+    There's an option to configure integration templates.
+    Please see :ref:`integrations-rcextensions` section.
+    rcextensions examples are here: https://code.rhodecode.com/rhodecode-enterprise-ce/files/default/rhodecode/config/rcextensions/examples/custom_integration_templates.py

docs/integrations/redmine.rst

@@ -26,3 +26,9 b' available.'
 
 Once you have the API key, create a Redmine integration as outlined in
 :ref:`creating-integrations`.
+
+
+.. note::
+
+    There's an option to configure integration templates. Please see :ref:`integrations-rcextensions` section.
+    rcextensions examples are here: https://code.rhodecode.com/rhodecode-enterprise-ce/files/default/rhodecode/config/rcextensions/examples/custom_integration_templates.py
  No newline at end of file