[JIRA] jira.myself() -method missing from JIRA-docs (#1306)

* JIRA issue property methods

* JIRA issue property docs

* JIRA issue property docs

* JIRA issue property tests

* JIRA issue property: clean code

* [JIRA] jira.myself() -method missing from JIRA-docs

---------

Co-authored-by: Kyösti Viinamäki <kyosti.viinamaki@op.fi>

Author: koysti

docs/jira.rst

@@ -61,6 +61,9 @@ Manage users
 
 .. code-block:: python
 
+    # Get myself
+    jira.myself()
+
     # Get user
     jira.user(account_id)