Misc doc changes

Signed-off-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>

Author: AyanSinhaMahapatra

docs/source/contribute/long_running_issues.rst

@@ -328,10 +328,9 @@ Then:
    and improve your chances of selection.
 #. Refer the Projects Ideas list for details on tentative projects.
 
-     - :ref:`GSoC2019`
-     - :ref:`GSoD2019`
+     - `GSoC2023 <https://github.com/nexB/aboutcode/wiki/GSOC-2023>`_
 
-#. Remain active in Gitter and talk with the organization mentors well ahead of the deadlines.
+#. Remain active in Element and talk with the organization mentors well ahead of the deadlines.
 #. Select projects according to your skills and finalize project proposals.
 #. Discuss your proposals extensively with corresponding mentors.
 #. Apply for the Programs well before the Deadline.