docs: Fix incorrect namespace in swhpkg example

@KShivendu did I get this right?

docs/swhpkg.rst

@@ -96,4+96,4 @@
      - Dependencies of the project. There can be many of them.
    * - ``dependent``
      - ``swhpkg:release``
      - ``swhpkg:js/d3``
      - A reference to the package release that depends on the dependency.
    * - ``dependency``
      - ``swhpkg:package``
-     - ``swhpkg:js/d3``, ``swhpkg:python/django``
+     - ``swhpackages:js/d3``, ``swhpackages:python/django``
      - A reference to the package that is depended on.
    * - ``constraint``
      - Text

[Kumar Shivendu]

-     - ``swhpkg:js/d3``
+     - ``swhpackages:js/d3``

[Kumar Shivendu]

One more @vlorent. Rest looks good.