Add link to doc explaining the feature

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

Author: AyanSinhaMahapatra

docs/source/archive/gsoc-toc.rst

@@ -14,11 +14,11 @@ GSoC 2022
 .. toctree::
    :maxdepth: 2
 
+   gsoc/reports/2022/scancode_kevin
    gsoc/reports/2022/scancodeio_akhil
    gsoc/reports/2022/scancode_workbench_omkar
    gsoc/reports/2022/vulnerablecode_vulntotal_keshav
    gsoc/reports/2022/vulnerablecode_ziad
-   gsoc/reports/2022/scancode_kevin
 
 GSoC 2021
 ---------

docs/source/archive/gsoc/reports/2022/scancode_kevin.rst

@@ -53,6 +53,8 @@ Links
 `GSoC Proposal <https://docs.google.com/document/d/1FGkFTN79Hq
 -Z0FLVZdeqn1B9TgTamo9T3Mux1HU4h8M/edit?usp=sharing>`_
 
+`Documentation page about the feature <https://github.com/KevinJi22/scancode-toolkit/blob/external-licenses-480/docs/source/how-to-guides/install_new_license_plugin.rst>`_
+
 Acknowledgements
 ----------------