When installing python 3.9 on v2 throws annoying warning that displays as error after actions is completed.

[AraHaan]

Describe the bug
A clear and concise description of what the bug is.
When installing python 3.9 from this action, it complains about the x64 and x86 python script dirs not being in the PATH.

Which version of the action are you using?

• v1
• v2
• Some other tag (such as v2.0.1 or master)

Environment

• self-hosted
• Linux
• Windows
• Mac

If applicable, please specify if you're using a container

Python Versions
Please list all of the effected versions of Python (3.8.2, etc.)
3.9 stable

To Reproduce
Steps to reproduce the behavior:

1. Try this in both x86 and x64

 - uses: actions/setup-python@v2
   with:
     python-version: '3.9'
     architecture: 'x86'

2. Wait for it to download and install.
3. Notice that after it tries to upgrade pip that it throws an warning that is annoying to see.
4. Notice that after the action is 100% completed on the job that it shows up as an error as shown in the screenshot below.

Run/Repo Url
If applicable, and if your repo/run is public, please include a URL so it is easier for us to investigate.
(RUN) -> https://github.com/AraHaan/pthmgr/actions/runs/317209470
(Repo) -> https://github.com/AraHaan/pthmgr/

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
Add any other context about the problem here.
I would like this problem fixed somehow, I think that is also supposed to be added to the path as well temporarily so it can shut up.

[cclauss]

Duplicate of #146