adjust action parameters based on original tailscale/github-action

`oauth-client-secret` is renamed to `oauth-secret` to match the original action.

Not all of the descriptions matched exactly, but this attempts to take the best from both versions.

Default Tailscale version is updated to 1.88.3.

Updates tailscale/corp#32814

Signed-off-by: Percy Wegmann <percy@tailscale.com>