Fix dead scancode documentation link (#4692)

Author: ShraddhaSharma3

CONTRIBUTING.rst

@@ -85,7 +85,7 @@ template. Your help and contribution make ScanCode docs better, we love hearing
 
 The ScanCode documentation is hosted at `scancode-toolkit.readthedocs.io <https://scancode-toolkit.readthedocs.io/en/latest/>`_.
 
-If you want to contribute to Scancode Documentation, you'll find `this guide here <https://scancode-toolkit.readthedocs.io/en/latest/contribute/contrib_doc.html>`_ helpful.
+If you want to contribute to Scancode Documentation, you'll find `this guide here https://scancode-toolkit.readthedocs.io/en/latest/getting-started/contribute/contributing-docs.html`_ helpful.
 
 Development
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