title: pip install --upgrade gives the same warning
body: <pre><code>Successfully installed pip-21.0.1
  WARNING: You are using pip version 20.2.1; however, version 21.0.1 is available.
  </code></pre>
  <p>Full trace</p>
  <pre><code>$ /usr/bin/python3 -m pip install --upgrade pip
  Defaulting to user installation because normal site-packages is not writeable
  Collecting pip
    Downloading pip-21.0.1-py3-none-any.whl (1.5 MB)
       |████████████████████████████████| 1.5 MB 19.7 MB/s
  Installing collected packages: pip
    WARNING: The scripts pip, pip3 and pip3.6 are installed in '/home/ubuntu/.local/bin' which is not on PATH.
    Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
  Successfully installed pip-21.0.1
  WARNING: You are using pip version 20.2.1; however, version 21.0.1 is available.
  You should consider upgrading via the '/usr/bin/python3 -m pip install --upgrade pip' command.
  </code></pre>
  <p>Despite upgrading why does it give the warning?</p>