Fix linkcheck

Apparently, GitHub now adds the README HTML on a project page
dynamically through JS, which prevents Sphinx's link checker from
finding anchors into the README.

Author: jeanas

source/guides/tool-recommendations.rst

@@ -82,7 +82,7 @@ migration, and what settings to change in your clients.
        later.  See the :pep:`rationale section <453#rationale>` from :pep:`453`
        as for why pip was chosen.
 
-.. [3] `get-pip.py <https://github.com/pypa/get-pip/#readme>`_ and
+.. [3] `get-pip.py <https://github.com/pypa/get-pip>`_ and
        :ref:`virtualenv` install
        :ref:`wheel`, whereas :ref:`ensurepip` and :ref:`venv <venv>` do not
        currently.  Also, the common "python-pip" package that's found in various

source/overview.rst

@@ -237,9 +237,9 @@ machines of developers and data scientists.
 
 Technologies which support this model:
 
-* :gh:`PEX <pantsbuild/pex#user-content-pex>` (Python EXecutable)
+* :gh:`PEX <pantsbuild/pex>` (Python EXecutable)
 * :doc:`zipapp <python:library/zipapp>` (does not help manage dependencies, requires Python 3.5+)
-* :gh:`shiv <linkedin/shiv#user-content-shiv>` (requires Python 3)
+* :gh:`shiv <linkedin/shiv>` (requires Python 3)
 
 .. note:: Of all the approaches here, depending on a pre-installed
           Python relies the most on the target environment. Of course,
@@ -311,8 +311,7 @@ A selection of Python freezers:
 * `pynsist <https://pypi.org/project/pynsist/>`_ - Windows only
 
 Most of the above imply single-user deployments. For multi-component
-server applications, see :gh:`Chef Omnibus
-<chef/omnibus#user-content--omnibus>`.
+server applications, see :gh:`Chef Omnibus <chef/omnibus>`.
 
 
 Bringing your own userspace