Replace references to phabricator by gitlab in the getting started pages

There are plenty of other phabricator links in another places in the
doc, but this ones are the first encountered by a new comer.

Related to swh/devel/swh-docs#4732

README.md

@@ -22,7 +22,7 @@ How to build the doc
 
 Install the [Software Heritage development environment][2]
 
-    $ git clone https://forge.softwareheritage.org/source/swh-environment
+    $ git clone https://gitlab.softwareheritage.org/swh/devel/swh-environment.git
     $ cd swh-environment
     $ ./bin/update  # this will clone needed git repos, inc. swh-docs
     $ cd swh-docs
@@ -116,7 +116,7 @@ The HTML documentation is now available starting from `docs/_build/html/index.ht
 
 
 [1]: http://www.sphinx-doc.org/
-[2]: https://forge.softwareheritage.org/source/swh-environment/
+[2]: https://gitlab.softwareheritage.org/swh/devel/swh-environment.git
 [3]: https://graphviz.org
 [4]: http://plantuml.com
 [5]: https://inkscape.org/

docs/devel/developer-setup.rst

@@ -14,7 +14,7 @@ hack it, and run locally the unit tests.
 To test the effect of your modifications, you can :ref:`install your own local
 Software Heritage instance <getting-started>` using Docker.
 
-.. _`documentation`: https://forge.softwareheritage.org/source/swh-environment/browse/master/docker/README.rst?as=remarkup
+.. _`documentation`: https://gitlab.softwareheritage.org/swh/devel/swh-environment/-/blob/master/docker/README.rst
 .. _`virtual environment`: https://packaging.python.org/en/latest/guides/installing-using-pip-and-virtual-environments/#creating-a-virtual-environment
 
 
@@ -86,7 +86,7 @@ Checkout the source code
 
 Clone the |swh| environment repository::
 
-    ~$ git clone https://forge.softwareheritage.org/source/swh-environment.git
+    ~$ git clone https://gitlab.softwareheritage.org/swh/devel/swh-environment.git
     [...]
     ~$ cd swh-environment
     ~/swh-environment$
@@ -280,5 +280,5 @@ forge. See the guide on :ref:`how to submit patches <patch-submission>`.
 .. _pytest: https://pytest.org
 .. _tox: https://tox.readthedocs.io
 .. _pypi: https://pypi.org
-.. _swh-loader-git: https://forge.softwareheritage.org/source/swh-loader-git
+.. _swh-loader-git: https://gitlab.softwareheritage.org/swh/devel/swh-loader-git
 .. _pifpaf: https://github.com/jd/pifpaf

docs/devel/getting-started.rst

@@ -31,7 +31,7 @@ Quick start
 First, retrieve Software Heritage development environment to get the
 Docker configuration::
 
-   ~$ git clone https://forge.softwareheritage.org/source/swh-environment.git
+   ~$ git clone https://gitlab.softwareheritage.org/swh/devel/swh-environment.git
    ~$ cd swh-environment/docker
 
 Then, start containers::

setup.py

@@ -33,7 +33,7 @@ setup(
     python_requires=">=3.7",
     author="Software Heritage developers",
     author_email="swh-devel@inria.fr",
-    url="https://forge.softwareheritage.org/source/swh-docs/",
+    url="https://gitlab.softwareheritage.org/swh/devel/swh-docs/",
     packages=find_packages(),
     scripts=[],
     install_requires=parse_requirements(),