Update contributor rules.

Signed-off-by: Volker Theile <[email protected]>

Author: votdev

.gitignore

@@ -1,2 +1,3 @@
 /venv/
 /_build/
+/.idea/

development/contribute.rst

@@ -32,7 +32,8 @@ Code contributions
     * The code/feature/improvement must not affect existing functionality.
     * Each commit in a `GitHub pull request <https://github.com/openmediavault/openmediavault/pulls>`_
       must be signed via ``Signed-off-by: Frank Mustermann <[email protected]>``.
-    * If the PR fixes an Github issue, then the following line ``Fixes: https://github.com/openmediavault/openmediavault/issues/<ISSUE_NR>``
+    * If the PR fixes an `Github issue <https://github.com/openmediavault/openmediavault/issues>`_,
+      then the line ``Fixes: https://github.com/openmediavault/openmediavault/issues/<ISSUE_NR>``
       must be included.
     * You have to subscribe the CLA online via GitHub.