Description:
When a version is prefixed with == and is not found in the local cache, it fails to be found for downloading.

I encountered this while specifying the version through project.requires-python in pyproject.toml.
I'm not sure if python-version also has this issue, but I presume so.

Action version:
v4.7.0

Platforms:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:
Every Python version not in the local cache

Repro steps:
I was originally using python-version: ['3.10.10'], which successfully downloads.
Upon changing to use python-version-file: pyproject.toml with requires-python = "==3.10.10" (under [project]) in pyproject.toml, the version fails to be found.

Additionally, I confirmed that this is only an issue when the version is not found in the local cache, as removing the patch version in pyproject.toml and changing it to requires-python = "==3.10" successfully installs the version in the local cache.

Expected behavior:
The version is successfully downloaded and installed

Actual behavior:
The version fails to be found